Info on new Bosch fuel pumps for E500E

[gerryvz]

Hello all,

It looks like AutohausAZ.com has reduced the price on E500E (as well as C126) Bosch fuel pumps to around $92 apiece. This is about a $30 reduction from what I remember them being a couple of years ago -- if you are in the market for a pump (or want to grab a couple for that moment in time when you will need them), it's probably a good time to stock up on a couple. Remember that our E500Es require TWO pumps. This price is more than 70% off the MB list price for the same pump, and is even far below the price you can get on parts.com for the identical pump !!! Free UPS Ground shipping, too!!

http://www.amazon.com/Bosch-69608-Original-Equipment-Replacement/dp/B000BZIDP8/

https://www.fcpeuro.com/products/mercedes-electric-fuel-pump-0580254950

https://www.rmeuropean.com/Products/003091530180-MFG14.aspx

http://www.autohausaz.com/search/product.aspx?sid=aft3fu55wvzzpe55fwiqha55&partnumber=003-091-53-01


Wookie Edit:
MB # 003-091-53-01
Bosch # 69608
Added Amazon link; added FCP/RME links


Cheers,
Gerry

P.S. These pumps come with new check valves too, which is also available from MB as a separate part.

 

[500AMM]

Re: Bosch fuel pumps - reduced price

Gerry - that was a great offer!
Even with overseas shipping and VAT to Morepay it'll be huge savings, probably cheaper than in Sweden too. I think I'll go for a couple.

Thanks
-arnt-

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

If you want to order them and have them sent to me, I'll throw them in the box with the LCAs......

 

[DarkStar]

Re: Bosch fuel pumps - reduced price

Great deal ! I think I might just pick some up, my pump sounded like it was full of rocks the other day. Also smelled fuel when I got out of the car after driving... need to find some time to really go thru things!

 

[400Eric]

Re: Bosch fuel pumps - reduced price

You said these were also used on the C126. That was a CIS-E car correct? So these pumps are OK with the higher fuel pressure that the CIS-E cars operate under?
Regards, Eric

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

That is correct, this identical pump is used on the later C126 cars (420s and 560s) in a dual-pump configuration, in a similar setup and location as with the 500E/E500.

If I remember correctly, the typical fuel pressure of a CIS-E car (at least with the 560SEL/SEC in the 126) is around 75-85 PSI.

The 5.6-liter M117s and the 4.2/5.0 M119s use a very different fuel pressure regulator, as well as delivery system. The M117 uses a fuel distributor (aka "fuel head") to send fuel equally to all injectors, which are simple on-off devices that pop open when the system pressure threshhold is reached. The M119 fuel is distributed through the C-shaped fuel rail to all of the injectors, which are electronically controlled.

The CIS-E diaphragm (fuel) pressure regulator costs about $250-300; the fuel pressure regulator as used on the M119/M104 motors is what, about $35-40? Much cheaper.

Cheers,
Gerry

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

I had to get two more of these pumps to replace a failing pump in my wife's 1995 E320 wagon. (The late wagons take the same pumps as the CIS-E 126 coupes and also the E500E). The best price I was able to get was $87 apiece directly from Amazon.com, along with the proper Mann fuel filter to go with them. Free shipping (if you do super saver shipping) although I got free 2-day shipping because I joined the Amazon Prime club. This $87 deal is even better than AutohausAZ.com !! The pumps shipped to me here in Texas from Kentucky.

Have plenty of new MB copper fuel pump/line washers left over from my previous SEC fuel pump job, so guess I know what I'll be doing in the garage tonight....

Cheers,
Gerry

 

[jano]

Re: Bosch fuel pumps - reduced price

I just replaced the pumps this weekend, including the fuel filter, as a preemptive measure at nearly 120k miles. History doesn't show they have been replaced, and though I haven't experienced humping since this post, the loud noise from the pumps concerned me and thought this would be a good idea. In theory, this shouldn't be that hard a job, but holy smelly left over dissected carp it was a giant pain in the butt.

We clamped off the fuel lines, no problem. The fuel filter came off relatively easy, unlike the first time since I had tightened it last time instead of the mechanic (seems like everything touched by mechanics ends up being impossible to loosen). After a few attempts to remove the fuel lines from the pumps, decided it might be easier to remove the whole assembly after disconnecting the bracket followed by the electricals. That part was not too bad, then we spent the next two hours trying to get the fuel lines off the pumps... eventually a two-foot long lever attached to two pipe wrenches got the bloody things free. FSM shows this is supposed to be 27Nm. Yah, 27Nm my ass. Had I known it would be this tough, I would've just ordered new fuel lines between the pumps..

The hardest part in reassembly was getting the rubber electrical connects back over the connectors. Had to use a little lube on a couple. Reassembly otherwise wasn't too tough, and all was torqued to 27Nm with crush washers, and a 30 minute test drive revealed no leaks. This really ought to have taken no more than a couple hours, but it took nearly all day. Pfffft. The pumps are just as loud as before, maybe my ears are just sensitive to this particular sound. But it's done, was fun, and yet another project down!

Jano

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

Generally when the pumps start getting a bit noisy, you still have some time on them ... but it's borrowed from there on out. When they get gravelly sounding, it's "do not drive" time and time to get the pumps done stat. Still, doing that pump work builds character I think the job on my wife's wagon took me about 2.5-3 hours for similar reasons -- the connections BETWEEN the pumps were pretty tight. Helps to put some Kroil or Liquid Wrench on there (or even some WD40 overnight in a pinch) to help coax them free....reduces the effort by a good 50%.

17 and 18mm open-end wrenches are your Friends

Just be glad you didn't get a gasoline bath and the resultant burning sensation, which takes a while to go away. Or the time that I got a shot of petrol right down my ear canal. Had to crawl/stumble the 20 yards over to my backyard swimming pool (doubled over in pain all the way) to douse my entire head in the pool. Was too late though, it hurt intensely (9 on a 1-10 scale) for the next 90 minutes, and pretty badly (7 on a 1-10 scale) for the next few hours, then it started going down. I was 100% immobilized for the 90 minutes - all I could do is lay down and writhe in agony. Would be an awesome torture for Islamic terrorists save for the carcinogenic nature of the gas. Seriously the most intense non-hospital/medical pain I've ever experienced in my life, or hope to.

Good work though -- congrats !!

Cheers,
Gerry

 

[jano]

Re: Bosch fuel pumps - reduced price

Yikes!!! What do they put in TX gas?! My worst experience so far was a ruby-red shower from ATF when I replaced a kickdown solenoid (the internet said it'd be only a trickle. Don't trust everything you read on the internet).

I had a pan for gas ready below, and the hose clamp set from horror fright and there was a mild squirt of gas, some poured over my hand, but no burning. The smell was horrid.

I didn't see corrosion so didn't even think about using the liquid wrench, dagnabbit! Well, maybe next time.

 

[gsxr]

Re: Bosch fuel pumps - reduced price

Oooops. I think the kickdown solenoid "trickle" was with the car on a lift, i.e. level. If it was jacked up, or with the front wheels on ramps, so it was angled backwards... that might have turned into a Ruby Shower.

FYI, for the fuel pumps, release pressure in the gas tank by removing the cap (then replace it), and if possible wait at least a few hours (preferably overnight) since the key was last turned on before messing with the filter & pumps. This lets the pressure drop in the system so there's less chance of getting sprayed with gas. When you turn the key on, the pumps run for about 1 second and pressurize the system to approx 50psi.

 

[jano]

Re: Bosch fuel pumps - reduced price

Ooooohhhhh remove the gas cap! Brilliant! Hopefully there won't be a next time for a long time! The car was on the ramp for a good 5-6 hours (not overnight), and I did remember to disconnect the battery. I wouldn't have been able to release those brass lines/nuts with all the parts attached to the car, the Power of Grayskull doesn't work well in tight quarters.

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

Yes, this should be the first step. This is also stated in the service manual's procedure. So I don't forget, I open the gas flap and then twist off the gas cap, and "set" it on the fuel tank filler. When the job is done, I replace the cap and close the flap. Keeping the flap open reminds me to properly replace the cap...

And YES ... anytime working around fuel, DISCONNECT THE BATTERY !!! ALWAYS !!

Cheers,
Gerry

 

[jano]

Re: Bosch fuel pumps - reduced price

Weird. I used this document from the CD, Engine/119/47-5713F.pdf, and it doesn't mention removing the gas cap, starts with pinching the hoses. Maybe it was in the fuel filter fsm procedure *shrug*, can't find the document to verify at the moment. No big deal, lesson learned, hopefully others interested will find it helpful

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

This is in the FSM per the procedure to replace the fuel filter .....

 

[500AMM]

Re: Bosch fuel pumps - reduced price

At 50psi it can be really hard to open a 15+ years fitting.

If one of the fuel lines connected to the fuel rail (at left side) is disconncted, the system pressure should bleed off. It'll be some fuel spill but some rags sucks it up.

Cheers.

 

[gsxr]

Re: Bosch fuel pumps - reduced price

Weird. I used this document from the CD, Engine/119/47-5713F.pdf, and it doesn't mention removing the gas cap, starts with pinching the hoses. Maybe it was in the fuel filter fsm procedure *shrug*, can't find the document to verify at the moment. No big deal, lesson learned, hopefully others interested will find it helpful

Ah, good point, pinching the supply hose should isolate any pressure in the tank. Oooops. I still like to depressurize as much as possible, for grins...

 

[Christian_K]

Re: Bosch fuel pumps - reduced price

I just replaced the pumps this weekend, including the fuel filter, as a preemptive measure at nearly 120k miles. History doesn't show they have been replaced, and though I haven't experienced humping since this post, the loud noise from the pumps concerned me and thought this would be a good idea. In theory, this shouldn't be that hard a job, but holy smelly left over dissected carp it was a giant pain in the butt.

We clamped off the fuel lines, no problem. The fuel filter came off relatively easy, unlike the first time since I had tightened it last time instead of the mechanic (seems like everything touched by mechanics ends up being impossible to loosen). After a few attempts to remove the fuel lines from the pumps, decided it might be easier to remove the whole assembly after disconnecting the bracket followed by the electricals. That part was not too bad, then we spent the next two hours trying to get the fuel lines off the pumps... eventually a two-foot long lever attached to two pipe wrenches got the bloody things free. FSM shows this is supposed to be 27Nm. Yah, 27Nm my ass. Had I known it would be this tough, I would've just ordered new fuel lines between the pumps..

The hardest part in reassembly was getting the rubber electrical connects back over the connectors. Had to use a little lube on a couple. Reassembly otherwise wasn't too tough, and all was torqued to 27Nm with crush washers, and a 30 minute test drive revealed no leaks. This really ought to have taken no more than a couple hours, but it took nearly all day. Pfffft. The pumps are just as loud as before, maybe my ears are just sensitive to this particular sound. But it's done, was fun, and yet another project down!

Jano

Had EXACTLY the same on my 500E! We took a whole day to get those bloody metal hoses of the Pumps. Filter was easy compared to that.
Thats why i love the later style single pumps with its rubber hoses.

 

[400Eric]

Re: Bosch fuel pumps - reduced price

What "later style single pumps" are you referring to? Did later W124s come with them or are you referring to a different, later platform?
Regards, Eric

 

[Christian_K]

Re: Bosch fuel pumps - reduced price

What "later style single pumps" are you referring to? Did later W124s come with them or are you referring to a different, later platform?
Regards, Eric

Yes around mid/end 1994 Mercedes switched in Germany all double-pump designs to a single-pump setup. The Pumps are called "Schraubenspindelpumpe" english probably "Screw-Spindle-Pumps". They now working like Kompressors by having 2 rotating "screws" pressing the liquid further. With the Single-Pump they managed to keep the same pressure (4bar) with even raised flow-toughput (Liter per Hour) compared to the old double-pump design.
My C36AMG has this and both the Pump as well as the Filter is only connected to Rubber-Hoses, that are secured with ordinary hose clamps. A change is 5-10minutes. Will switch my 500E later over to that design for sure. EPC has all the Data and a single Pump at Bosch is ~130€ in Germany. A Mann/Mahle or Bosch Filter is another 20€ and then are the rubber-hoses left.

Problem is, if the single pump fails, then you stand there and your car wont drive anymoe. With the double-pumps it was, even if one fails, you could still drive as the other pump was working still.

Diagram for the 500E (Starting at VIN "C226336"):

 

[gsxr]

Re: Bosch fuel pumps - reduced price

Courtesy of remotemark - Amazon has the Bosch pumps for $82 with free shipping:

www.amazon.com/Bosch-69608-Original-Equipment-Replacement/dp/B000BZIDP8/

 

[Paul64]

Re: Bosch fuel pumps - reduced price

For us Europeans, how about this? Found it on a link off Amazon.co.uk..... http://www.merlinmotorsport.co.uk/p...NZ-500E-AMG-6.0-(580254911)/product_info.html

Seems a pretty good price - I'm aiming to change my pumps at the next service so would look at this as a pretty big saving!


Paul

 

[Christian_K]

Re: Bosch fuel pumps - reduced price

For us Europeans, how about this? Found it on a link off Amazon.co.uk..... http://www.merlinmotorsport.co.uk/p12100/Fuel-Pump-MERCEDES-BENZ-500E-AMG-6.0-%28580254911%29/product_info.html

Seems a pretty good price - I'm aiming to change my pumps at the next service so would look at this as a pretty big saving!


Paul

No Genuine Bosch.
I can get them even much cheaper in Germany from No-Name (china). I have for a test 2 china pumps in my 500E and i paid like 30€/piece.
They should last until i switch to the single-pump design.

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

Price on Bosch fuel pumps for the E500E (or C/W126) is now $78.72 apiece with free shipping, or if you have Amazon Prime, free 2-day delivery.

http://www.amazon.com/gp/product/B000BZIDP8/ref=oh_details_o01_s00_i01

If you haven't stocked up on a couple of pumps, it's now a good time to do so. You won't see the pumps get much cheaper than this. List price is well over $120 apiece....

AutohausAZ is charging $100.49 $117.01 apiece, with free shipping.....parts.com $220.80 apiece, plus shipping.

Cheers,
Gerry

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

I just now checked the price at Amazon on the Bosch fuel pumps. They are $95.47 apiece, with free shipping (or free two-day shipping with Amazon Prime). Still not a bad deal.

BTW this same Bosch pump works with the E500E, 400E/E420, HFM injection E320 models (at least all of them that used the dual pump setup), and late W126/C126 models with 5.6 and 4.2 liter displacement.

A good idea to stock up IMHO !!

 

[Maui]

Re: Bosch fuel pumps - reduced price

The price at Amazon as of June 1, 2014 is $99.66 each.

Bosch Fuel Pump

 

[Christian_K]

Re: Bosch fuel pumps - reduced price

Yes around mid/end 1994 Mercedes switched in Germany all double-pump designs to a single-pump setup. The Pumps are called "Schraubenspindelpumpe" english probably "Screw-Spindle-Pumps". They now working like Kompressors by having 2 rotating "screws" pressing the liquid further. With the Single-Pump they managed to keep the same pressure (4bar) with even raised flow-toughput (Liter per Hour) compared to the old double-pump design.
My C36AMG has this and both the Pump as well as the Filter is only connected to Rubber-Hoses, that are secured with ordinary hose clamps. A change is 5-10minutes. Will switch my 500E later over to that design for sure. EPC has all the Data and a single Pump at Bosch is ~130€ in Germany. A Mann/Mahle or Bosch Filter is another 20€ and then are the rubber-hoses left.

Problem is, if the single pump fails, then you stand there and your car wont drive anymoe. With the double-pumps it was, even if one fails, you could still drive as the other pump was working still.

Diagram for the 500E (Starting at VIN "C226336"):
View attachment 7924

DONE!
Will open a new Thread now. its really easy. Paid around 100€ for the Pump (Bosch - which is now manufactured by TI Automotive Poland for BOSCH)

 

[jouniu]

Re: Bosch fuel pumps - reduced price

Problem is, if the single pump fails, then you stand there and your car wont drive anymoe. With the double-pumps it was, even if one fails, you could still drive as the other pump was working still.

I tend to disagree with that. Pumps are in serial and if other fail the other pump cannot suck through the failed pump or push the proper pressure through the failed pump. I convert my 500SL to single
pump when other of the pumps failed. I use well known bosch -044, it can easily serve M119 fuel needs. (it cost ~$200, so it is not so cheap)

 

[J-Sauce]

Re: Bosch fuel pumps - reduced price

I had a failed pump in the series on my 500E. I had no idea until I installed my nitrous system and the increased fuel pressure needed for the kit could not be sustained. I was still able to drive around without any noticeable symptoms until I upgraded to a high flow pump from Walbro.

So I will attest to the fact that you can drive around with one bad fuel pump and still make it home. The problem is, you won't even know one pump is bad! The second pump probably isn't far behind, as I'm sure it's now working harder to overcome the restriction of the dead pump. So before you know it, you'll have two bad pumps anyway, leaving you dead in the water with twice the repair bill as a single pump.

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

+1

My understanding from knowledgeable sources has always been that one pump can be dead, and the car will still run OK with one pump in operation.

In the past few years, I have replaced the fuel pumps on my 560SEC and E320 wagon; I intend to replace the pumps proactively on my E500 later this year and save the current pumps as spares.

 

[Klink]

Re: Bosch fuel pumps - reduced price

+1

My understanding from knowledgeable sources has always been that one pump can be dead, and the car will still run OK with one pump in operation.

In the past few years, I have replaced the fuel pumps on my 560SEC and E320 wagon; I intend to replace the pumps proactively on my E500 later this year and save the current pumps as spares.

They will run fine on one pump, either one, doesn't matter at anything except high load and or high speed. The twin pump set up is actually a subtle and brilliant concept in more ways than just the redundancy. It significantly improves the lifespan and the noise emission the pumps. I'll explain later, got to go!

 

[M104-AMG]

Re: Bosch fuel pumps - reduced price

Don't forget the W124 also uses dual pumps . . .

neil

 

[400Eric]

Re: Bosch fuel pumps - reduced price

I just suffered through this with Benzer1. The first pump failed, and the second pump BARELY got me home. Maybe the fact that the CIS-E cars operate at such a higher presure, any weakness in the system is more quickly exposed.

I seem to remember that the CIS-E wagons have their two pumps in seperate locations. Wonder what that set-up is like. Maybe it was bunk information though.

It is interesting to note that the dual pump set-up went away shortly after the last CIS-E M103 powered W124s went away at the end of the 93 M.Y. (The 4matic model.)

Also interesting to note that junkyard CIS-E dual pump set-ups are used by the RWD turbo Volvo camp as a cheap upgrade.

I ended up with a little gas on my face, right in between my mouth and nose. Right where my moustace is. Moustace made it hard to remove quickly enough, and by the time I was able to get out from under the car, it had already had a chance to quickly soak in. Not pleasant. I was sniveling about it but after re-reading Uncle Gerry's account I stopped.

Regards,
Eric

 

[Klink]

Re: Bosch fuel pumps - reduced price

The 124 wagons do indeed have the dual pump set up it's only different in that one pump is near the tank and the other pump is in the usual location. They are functionally identical to the sedans in that one pump pumps through the other in a series arrangement.

There is actually a bit of brilliance in the twin series pump set up. The first bit is the simple redundancy. The second bit is that when the pumps are in series like that, each pump generates one half of the total working pressure in exactly the same manner as 2 equivalent batteries connected in series produce the total voltage. Since higher pressure is proportional to higher wear, the life of the pumps is extended.

I also heard somewhere that the resulting lower pressure gradient "across" each pump lessened the possibilities of cavitation related damage especially in the event that some bubbles are aspirated into the fuel flow, such as when the tank level is low and/or the fuel is particularly hot.

So I for one was not particularly happy to see the twin series pump set up go away, though I did realize and suspected that the modern electric systems operating at lower pressures permitted an acceptable fuel pump life. I figured time will tell and indeed it seems that the answer is in. We routinely see the axial screw type pump that replaced the twin roller vane pumps run to 200,000+ miles without a problem.

For those recently fretting that what were advertised as new Bosch pumps were arriving branded as "TI Automotive", you may have noticed that the pumps appear to be identical to the Bosch pumps. Note that a while ago Bob Bosch spun off some of it's automotive supplier subgroups. In particular some of, maybe even all of their electric fuel pump operations were spun off to TI Automotive. I am pretty sure that TI has also owned Peirburg's electric fuel pump operations for some time now as well.

In a similar manner some people have complained that headlamps and foglamps advertised as Bosch had arrived branded as "Automotive Lighting", and that they were often made in Czechoslovakia. Some of the same people also noted that everything about those light units appeared to be identical. Indeed they were identical. Bosch built those plants in Czechoslovakia and spun them off as "Automotive Lighting". I don't know if Bosch still owns AL, or if it is a completely separate company. I suspect that almost all of these moves have to do with tax or labor union dodges. They don't always affect the finished product negatively. And in the case of TI pumps and AL lighting it appears that nothing bad has taken place as far as the product.

The only constant will continue to be change...


Sent from my iPhone using Tapatalk

 

[ollo]

Re: Bosch fuel pumps - reduced price

Price update: Just bought 2 today at $86 each with free shipping, but they were the last 2 at that price, Amazon now has them at $88.71 with 20 available.
Don

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

Just to note ... Amazon's price for the pumps is now $103, and AutohauZ is up to ~$127ish....per pump.

 

[gsxr]

Re: Bosch fuel pumps - reduced price

Watch out for counterfeit Bosch (and Walbro) pumps out there...

http://www.bimmerforums.com/forum/showthread.php?1109573-Bosch-044-fuel-pump-knock-offs!

 

[gerryvz]

Re: Bosch fuel pumps - reduced price

I just did a price check on the Bosch fuel pumps ... still holding via Amazon Prime (free 2-day shipping) at $103 a pop. Still a decent price, so if you don't have a couple of spares (and yes, you need TWO for the E500E) it's not a bad idea to pick up a couple.

Cheers,
Gerry

 

[esurgeon]

Need a new fuel pump

Hi guys,

Need some advice. My car is in with Mercedes to have a leaking fuel line replaced. They've just told me the fuel pump also needs to be replaced.

Can anyone recommend where to buy the replacement? What make and part number etc? Was Bosch the original brand of did MB make their own?

Thanks in advance.

Ed

 

[doolar]

Re: Need a new fuel pump

Hi Ed,

If you search for ”fuel pump” in the search box there’s plenty of threads on the topic with both original p/n’s as well as aftermarket ones. This topic has been discussed in detail here on the boards!

 

[gerryvz]

Re: Need a new fuel pump

I find the best place to get fuel pumps is Amazon, the Bosch units. Just do a search for "Amazon fuel pumps" and you should find a few threads on the topic.

https://www.500eboard.com/forums/showthread.php?t=2278

https://www.amazon.com/Bosch-69608-Original-Equipment-Replacement/dp/B000BZIDP8/

A great deal at $89 apiece at the moment ... should get two of them as spares !!

AHAZ has them for $108: http://www.autohausaz.com/search/product.aspx?sid=xwtecwb3mk5m5j45yttri5mu&partnumber=0030915301

Admin edit: Merged threads on same topic.

 

[quantumorbit]

I got Mercedes part number 003-091-53-01-26 for the main pump and 000-470-78-94 for the auxiliary pump, as if they're not supposed to be the same. When I search for the first number at AutohausAZ I get Bosch 69435 pump, but I see here you guys recommend to get Bosch 69608 which is actually a bit cheaper.

Any comments?

 

[gerryvz]

I got Mercedes part number 003-091-53-01-26 for the main pump and 000-470-78-94 for the auxiliary pump, as if they're not supposed to be the same. When I search for the first number at AutohausAZ I get Bosch 69435 pump, but I see here you guys recommend to get Bosch 69608 which is actually a bit cheaper.

Any comments?

View attachment 231232

I am not aware of a main pump and an auxiliary pump for the 500E/E500. I believe that both pumps are identical, and in-line. At least, I have always used identical pumps. The Bosch 69608 pump is the one that I have always used for the E500E, as well as my 560SEC.

I believe your part number 003 091 53 01 (I've seen this with both an -80 and -26 suffix) is the correct part number for BOTH pumps.
RevParts sites are saying these pumps are NLA from MB, but MB Classic Parts indicates they are available. This is an anomaly with RevParts, and I wouldn't believe them in this specific instance.

I have a NOS Bosch set in my parts stock, as shown below. It is Bosch part number 0 580 254 950, which (per the screen shots further below from AutohauZ) equates to Bosch 69608.



AutohauZ screen shots:



Currently Amazon has them for $100 apiece via Prime, and AutohauZ has them for $103. FCP Yurro has them for $98 each, with free shipping.

 

[quantumorbit]

Thanks, will go with Bosch 69608 per your recommendation

 

[gsxr]

I got Mercedes part number 003-091-53-01-26 for the main pump and 000-470-78-94 for the auxiliary pump, as if they're not supposed to be the same. When I search for the first number at AutohausAZ I get Bosch 69435 pump, but I see here you guys recommend to get Bosch 69608 which is actually a bit cheaper.

Any comments?

You are using a dealer website to look up part numbers. DO NOT DO THIS. NEVER EVER EVER! What the website shows is WRONG. Get part numbers from the EPC or ISPPI, or this forum. Then search for the part numbers at your favorite vendors. As Gerry stated above, there is no auxiliary pump.

All the information you need is in this thread, including other parts to consider replacing at the same time, and part numbers for the copper O-rings needed.

Bosch 69608 is correct through mid-1995 USA model years. Make sure to buy from a reputable vendor only, there's a lot of counterfeit Bosch stuff out there. If buying on Amazon, only buy if it ships from Amazon, not a third party.

 

[gsxr]

I got Mercedes part number 003-091-53-01-26 for the main pump and 000-470-78-94 for the auxiliary pump...

Additional info: 003-091-53-01-26 is the correct part number for dual fuel pumps used through mid-1995 USA model year production.

000-470-78-94 is the correct part number for the single fuel pump used as of late 1995 USA model year production.

The two types are completely different and NOT interchangeable.

 

[quantumorbit]

Looking at my parts bin I found Bosch 69435 that I recently ordered for my 190E 2.3-16, the same pump that showed up when I searched for 003-091-53-01-26. Found this thread claiming they're the same with Bosch 69608, but after some research it turns out they're very similar but not the same, flow rate is a bit different.
Differences between Bosch 69435 and 69608 Fuel Pumps

 

[gerryvz]

The pumps you want (both) are the Bosch 69608, trust me.

 

[quantumorbit]

The pumps you want (both) are the Bosch 69608, trust me.

I already ordered two 69608s, thanks. Just for reference I'm posting photos of the Bosch 69435 that I already have.

 

[gsxr]

Great information - thanks for sharing! Looks like the 69435 flows more at a given pressure. Not really needed except for something like a nitrous application.