G320 - Dec 1994 model - Throttle body questions

[Coolhandluke]

Hi Gerry and all G320 owners,

I have a couple of questions I hope someone can help me clarify about the G320 throttle body.

Like many people I am having erratic idle issues with my G-wagon. Some days the car sparks to life with one turn of the key and runs perfect. A few hours later or another day it will start then stop, restart and stop. If it stays on there is erratic idling until it settles down (why it does I cannot figure that out). I can drive a few miles and come to a turn and the car sometimes cuts-out. This is a very dangerous situation and I have nearly had other drivers crash into me. Its making me so nervous that I am reluctant to drive it any more.

I have replaced every Sensor on the car (Lambda, Crank, Camshaft, Mass A/f, Air Temp, Magneto and 3 water temp sensors), except the external air temp sensor that I simply cannot find the location of. So I am confident that its not one of the sensors. I have also completely cleaned the Throttle body with Throttle-body cleaner. I cleaned, tested all the injectors and replaced the seals, as well the fuel regulator and in-line fuel filter on the injector rail and the fuel filter at the rear of the car

As far as I can see the wiring harness looks to have been replaced (or original but one that Mercedes changed after realising their mistake), there is no evidence of any cracking or deterioration of the wires. So now I think the only thing is the Throttle body. My car has cruise control and the part number is 000 141 5725.

I have been to my local Mercedes dealer and they gave me a print-out for my car that showed there were three variants of the throttle body:
1. A 000 141 9825 (It said it was replaced by part number A 000 141 0325
2. A 000 141 0325 (Cruise control actuator) used without ASR
3. A 000 141 5725 (Cruise control actuator) used without ASR.

My questions are:-
1. Are these throttle bodies interchangeable?
2. Does my car have ASR?
3. Is the 5725 the part number that has both internal wiring and the "Clutch" problems? I believe this is one of the most difficult to repair.

I have found a Company that has one they have re-furbished and re-wired but they never mentioned anything about the "Clutch" being replaced/repaired. Its a lot of money so I would appreciate any opinions before going down that road. They do give a 12 month warranty.
Many thanks,
CHL

 

[gsxr]

My questions are:-
1. Are these throttle bodies interchangeable?

Probably not interchangeable. The EPC indicates one of those part numbers is for LHD up to 1995, the other number is for RHD as of 1996. The difference may just be the length of the wire... maybe. Can't tell for certain without the VIN.
EDIT: See post #4 below for update with VIN-specific information.

2. Does my car have ASR?

Not sure what car you have, but your truck likely does not, since the dealer provided you numbers for trucks without ASR. Models with ASR will have a square orange warning lamp in the center/top of the speedometer, and likely a snow chain switch also. Look up the datacard for your VIN, if it has ASR it would be option code 471. I expect you won't find that code.

3. Is the 5725 the part number that has both internal wiring and the "Clutch" problems? I believe this is one of the most difficult to repair.

The wiring issues are not related to certain part numbers. ALL part numbers of ETA's have the wiring problems. It's based on date codes. Originals through about 1996 production had the defective wire insulation. Later datecodes have good insulation.

I have found a Company that has one they have re-furbished and re-wired but they never mentioned anything about the "Clutch" being replaced/repaired. Its a lot of money so I would appreciate any opinions before going down that road. They do give a 12 month warranty.

What company, and where are they located? If they don't specifically mention internal parts being replaced, they are not replacing the internal parts (microswitches, clutch, potentiometers). Rewiring won't help if internal components have failed... or are about to fail.

 

[Coolhandluke]

Hi GSXR,

Many thanks for replying so quickly and with great info. Much appreciated.

Well my car is from Nov 1994 and is European so you have answered the questions about the interchangeability and Years with good/bad wiring. My car is indeed Left-hand drive using the 5725 part number.
Also I do not see any ASR light (there is an SRS light) and there is no button that I can see about Snow-Chains, so I guess that clears that up.

I don't have access to that EPC system but my VIN number is WDB46323117098014 - Nov 1994 Left Hand drive model. Just in case you can see any more useful info than I can gain.

The Company is "Kurth Classic Auto Parts" in Germany. I have bought many parts from them, great service and price. They have a range of parts that I could not find elsewhere. I have mentioned this supplier previously to other 500E members who had similar issues. (I am not in any way connected to them, its only through previous buying for my own car!!). What caught me out is that on their web-page they have a Tab for each type of Mercedes including W463. So I have never seen a 5725 throttle body listed. But, a few days ago I thought what if they have it under another Mercedes model and sure enough they have a refurbished one available.

Again, many thanks for your help.

Best regards,
CHL

 

[gsxr]

The VIN is a big help! See updated screenshot below specific to your VIN. Your G320 does not have ASR (no code 471 in datacard). Click here to see an online datacard.

The dealer part numbers are correct... however the footnotes change based on your VIN / chassis number. The part numbers differ based on the engine serial (not model year or LHD/RHD). Yours should be 000-141-57-25 since your engine is prior to the breakpoint of #001163.

I believe Kurth may not have an ETA on the shelf ready to ship, but you'd have to contact them and ask. They may need you to send yours in for testing & repair. I believe their base price is only for rewiring and testing. If additional components needs replacement (switches, pots, clutch) the price will be higher.

 

[Coolhandluke]

Hi GSXR,
Many, many, many thanks. All that info on the data sheet is so useful and will stay with the car until the end.
And now I know for certain about the correct throttle body part No..
Cheers,
CHL

 

[Falkon]

The VIN is a big help! See updated screenshot below specific to your VIN. Your G320 does not have ASR (no code 471 in datacard). Click here to see an online datacard.

The dealer part numbers are correct... however the footnotes change based on your VIN / chassis number. The part numbers differ based on the engine serial (not model year or LHD/RHD). Yours should be 000-141-57-25 since your engine is prior to the breakpoint of #001163.

I believe Kurth may not have an ETA on the shelf ready to ship, but you'd have to contact them and ask. They may need you to send yours in for testing & repair. I believe their base price is only for rewiring and testing. If additional components needs replacement (switches, pots, clutch) the price will be higher.



View attachment 203618

Hello GSXR,

I hope you are doing great in the new year.

Please, I need your assistance with identifying the correct Throttle Body for my 1996 G320 with VIN: WDB46323117105387. A complete component data card for my vehicle will also be greatly appreciated.

Referencing a snapshot from your earlier post @ #2, my Throttle Body does not have the extended Connector Pigtail, rather the Connector Plug is located directly on the ETA and has about 6 Pins as shown below.

 

[gsxr]

EPC screenshot below for your specific VIN. Based on your engine number, it appears the correct ETA is p/n A0011410325.

The diagrams are not meant to be exact, so ignore the wire pigtail shown if your ETA does not have one. Most likely, some earlier models (the older part numbers in the previous EPC screenshot) did have the wire pigtail.

 

[Falkon]

EPC screenshot below for your specific VIN. Based on your engine number, it appears the correct ETA is p/n A0011410325.

The diagrams are not meant to be exact, so ignore the wire pigtail shown if your ETA does not have one. Most likely, some earlier models (the older part numbers in the previous EPC screenshot) did have the wire pigtail.


View attachment 232814
View attachment 232815

Thanks a great deal, brother.

And with such a quick response, you are most appreciated.

Now, you have armed me with the right information to start hunting for the ETA. Hopefully I will find one at a decent enough price.

I am open to suggestions or recommendations as well.

 

[Falkon]

EPC screenshot below for your specific VIN. Based on your engine number, it appears the correct ETA is p/n A0011410325.

The diagrams are not meant to be exact, so ignore the wire pigtail shown if your ETA does not have one. Most likely, some earlier models (the older part numbers in the previous EPC screenshot) did have the wire pigtail.


View attachment 232814
View attachment 232815

Here's what my ETA look like

 

[gerryvz]

Here's what my ETA look like

View attachment 232847 View attachment 232848

That is a completely different ETA than at least my 1995 G320 has. Mine has the same non-ASR ETA that is used in 1994 and 1995 E320 passenger sedans and wagons. Yours must have been replaced with this part at some point.

My ETA looks EXACTLY like the ETA in the drawing that the @gsxr posted.

Please pull your ETA and examine the exterior of it very closely for any part numbers. It is very definitely not the correct one that would have come on the 104.996 engine.

 

[gsxr]

Gerry, his truck is a mid-1996 build... it may use different ETA than your 1995. But yes, it would be good to identify the part number on the label currently installed.

 

[gerryvz]

I believe that all 104.996 engines used the same ETA part.

My engine number is 104996 12 000674, and was built in the fourth quarter of 1994.

 

[gsxr]

EPC shows the ETA changed at engine serial # 1163 / 1164. Yours would use the earlier p/n, Falkon's is engine # 2472 and would use the later p/n:

 

[gerryvz]

Gerry, his truck is a mid-1996 build... it may use different ETA than your 1995. But yes, it would be good to identify the part number on the label currently installed.

Here is the ETA supercession for my own VIN/engine number:



Here is the ETA supercession for @Falkon's engine. Both of these references are from the ISPPI, which would be what the dealers have access to.


What I can now reveal, is that @Falkon's ETA ***IS CORRECT*** and is a direct factory replacement for the original ETA.

Per the supercession above, MB moved from the "traditional" design/housing ETA (that we are familiar with from the E500E, and HFM E320s, etc.) to the design that @Falkon has, which has the black plastic cap and more "exposed" air butterfly valve, and different connector.

It appears that the 000 141 03 25 part number, is the ETA external design that @Falkon has, as evidenced by the photos below. It was phased into production as of engine number 001164.



The more "traditional" design/housing ETA, part number 000 141 57 25, is the one that I have.

 

[gerryvz]

I believe that all 104.996 engines used the same ETA part.

My engine number is 104996 12 000674, and was built in the fourth quarter of 1994.

The above statement is incorrect. There was a revised part installed starting with engine #1164, per the ISPPI.

I see that GSXR found the same info as I did, around the same time. I posted my note directly above without refreshing and seeing his note above.

 

[gerryvz]

Interestingly, the older 57-25 part number is NLA from MB.

The newer 03-25 part number is showing as available.
From MB Annapolis:

 

[Falkon]

That is a completely different ETA than at least my 1995 G320 has. Mine has the same non-ASR ETA that is used in 1994 and 1995 E320 passenger sedans and wagons. Yours must have been replaced with this part at some point.

My ETA looks EXACTLY like the ETA in the drawing that the @gsxr posted.

Please pull your ETA and examine the exterior of it very closely for any part numbers. It is very definitely not the correct one that would have come on the 104.996 engine.

Yeah Gerry.

I recognized that your ETA looked like the E320 one I had in my earlier 1995 E320. I saw that in the article you wrote about the Top End overhaul of an M104 Engine and had commented about it on the thread.

What I have on my 1996 G320 is different and GSXR have pulled the specific Part Number for me based on my VIN.

 

[Falkon]

Gerry, his truck is a mid-1996 build... it may use different ETA than your 1995. But yes, it would be good to identify the part number on the label currently installed.

Thanks GSXR.

Unfortunately, the Label on my ETA has been wiped off

 

[Falkon]

Here is the ETA supercession for my own VIN/engine number:
View attachment 232869


Here is the ETA supercession for @Falkon's engine. Both of these references are from the ISPPI, which would be what the dealers have access to.
View attachment 232870

What I can now reveal, is that @Falkon's ETA ***IS CORRECT*** and is a direct factory replacement for the original ETA.

Per the supercession above, MB moved from the "traditional" design/housing ETA (that we are familiar with from the E500E, and HFM E320s, etc.) to the design that @Falkon has, which has the black plastic cap and more "exposed" air butterfly valve, and different connector.

It appears that the 000 141 03 25 part number, is the ETA external design that @Falkon has, as evidenced by the photos below. It was phased into production as of engine number 001164.
View attachment 232873 View attachment 232874 View attachment 232876


The more "traditional" design/housing ETA, part number 000 141 57 25, is the one that I have.
View attachment 232877 View attachment 232878 View attachment 232879

Hello Gerry,

Bravooo!!!! thanks a million for the detailed expose' on these ETAs. This is the same ETA that GSXR had pulled the part number for, per my VIN.

Your descriptions with the pictorial Snapshots are greatly illustrative and dispels all controversies.

- The Pin Contacts in my ETA is 6Pins (though with provision for 8 but only 6 are populated)
- The "Traditional" ETA shown has 11Pins (with provisions for 14 but on 11 are populated)

 

[Falkon]

Interestingly, the older 57-25 part number is NLA from MB.

The newer 03-25 part number is showing as available.
From MB Annapolis:
View attachment 232881

Thanks a lot Gerry.

At least it shows that a new one is available albeit at a very steep price.

I will keep this in view while I explore to see if I can get a cheaper option.

 

[gsxr]

000-141-03-25 is showing under $600 at online dealerships. That is super cheap. The early ETA 000-141-57-25 was $2590 MSRP / ~$1800 discount prior to NLA.

The 500E ETA's were $1.5k+ when available new, and now that they are NLA, repair service is $600-$900 with mixed results. If you can even find one NOS they are thousands of dollars.

If you need to replace 000-141-03-25 I'd buy new while you can for $600!! That's a steal.

Unfortunately... MBCC is showing 000-141-03-25 as NLA. There may or may not be any left in worldwide inventory. You'll need to call a dealer and talk to a live person to find out.

Mercedes-Benz Classic Parts Search.

Browse through the Mercedes-Benz Classic Parts Search to see the availability of parts, promotional and newly manufactured parts and order them online (only in Germany).

partssearch.mercedes-benz-classic.com

 

[Falkon]

000-141-03-25 is showing under $600 at online dealerships. That is super cheap. The early ETA 000-141-57-25 was $2590 MSRP / ~$1800 discount prior to NLA.

The 500E ETA's were $1.5k+ when available new, and now that they are NLA, repair service is $600-$900 with mixed results. If you can even find one NOS they are thousands of dollars.

If you need to replace 000-141-03-25 I'd buy new while you can for $600!! That's a steal.

Unfortunately... MBCC is showing 000-141-03-25 as NLA. There may or may not be any left in worldwide inventory. You'll need to call a dealer and talk to a live person to find out.

Mercedes-Benz Classic Parts Search.

Browse through the Mercedes-Benz Classic Parts Search to see the availability of parts, promotional and newly manufactured parts and order them online (only in Germany).

partssearch.mercedes-benz-classic.com

View attachment 232903

Thanks so much @gsxr.

Wow!! these things are really quite steeply priced. I will work on getting one ASAP.