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Rear differential removal

darek_u

E500E Guru
Member
Question for those of you who removed rear diff - is it necessary to remove the whole exhaust as per FSM? I'm just about to start unbolting parts but looking at the things underneath I may even say drive shaft can stay in place, the diff can be just lowered down a touch and slide backwards? Will it work?
 
No need to remove the ENTIRE exhaust, but you do need to remove the muffler.

However - to get the driveshaft to slide forward, you must loosen the driveshaft center support. Doesn't have to be removed, just loosened. For easy access, the FSM says to drop the entire exhaust. But if you remove the heat shield nuts, there is just barely enough room to slide tools up there to reach the 13mm hex head bolts and loosen each a few turns. Once that is done, the driveshaft will slide to the front enough to separate from the diff.

If removing the axle shafts, consider replacing the rear wheel bearings, if you have the tools for it. And if you haven't replaced the main fuel tank hose that exits the center of the tank, it will never be easier than when the diff is removed...

:spend:
 
I have dropped the exhaust anyway... So much more space. In fact cats are still half attached, kind of, but hanging aside. I'm replacing the rear diff with 2.24 one I purchased some time ago. We will see how it works matched with FGS that I just installed.
Wheels bearings - these have been replaced along with other suspension components, no need to do it again after 10kkm. I was looking at the fuel hoses... The return one definitely will be replaced, it should be easy to replicate by hydraulic shop. The main suction hose - hmmm, I look at it, squeeze it, touch it, examine and can't find anything wrong with it... Soft and pliable, no any cracks or other damages. I think I may check the price at local dealership, see how much it costs and maybe just replace it for a piece of mind?
 
I run across another problem... I cannot slide the driveshaft forward. Drivershaft center bearing is loose (bolts off), 4 bolts holding shaft to rear diff are off - I pry, I wiggle, I swear - no joy... Am I missing something or it is stuck?
 
I have dropped the exhaust anyway... So much more space. In fact cats are still half attached, kind of, but hanging aside. Im replacing the rear diff with 2.24 one I purchased some time ago. We will see how it works matched with FGS that I just installed.
Cool!


Wheels bearings - these have been replaced along with other suspension components, no need to do it again after 10kkm.
Definitely no need to replace again. Only if original from the early 90's.


I was looking at the fuel hoses... The return one definitely will be replaced, it should be easy to replicate by hydraulic shop. The main suction hose - hmmm, I look at it, squeeze it, touch it, examine and cant find anything wrong with it... Soft and pliable, no any cracks or other damages. I think I may check the price at local dealership, see how much it costs and maybe just replace it for a piece of mind?
Since the hose is soft and not cracked, you can probably leave it alone. But if it's original from the early 90's, a new one wouldn't be a bad idea. Replacement is very difficult with the differential in place. On most of my 124's, this hose is often cracked and hardened, to the point where it is almost impossible to use "hose pinch" tools to stop fuel flow when the hose is removed from the fuel pump.



I run across another problem... I cannot slide the driveshaft forward. Drivershaft center bearing is loose (bolts off), 4 bolts holding shaft to rear diff are off - I pry, I wiggle, I swear - no joy... Am I missing something or it is stuck?
If the flex disc is stuck on the diff flange and/or driveshaft flange, you'll have to pry it off one or the other. This can be VERY tight. Once the driveshaft is separated from the differential, it should slide forward an inch or two.

⚒️
 
If the flex disc is stuck on the diff flange and/or driveshaft flange, youll have to pry it off one or the other. This can be VERY tight.
To clarify things - flex disc bolts are removed from diff side, but still attached on the driveshaft, as per FSM. I don't think removing them gives any advantage as disc is kind of donut?
 
To clarify things - flex disc bolts are removed from diff side, but still attached on the driveshaft, as per FSM. I dont think removing them gives any advantage as disc is kind of donut?
Correct - just depends if the flex disc is more "stuck" to the driveshaft, or the differential.

If the flex disc is not separating from either flange, keep prying.
 
Yep. That's an automatic replacement of that flex disc. You would be crazy not to replace it given that you basically have it off the car now (unless it was fairly new).

I can also see cracks in your second photo, also indicators that it should be replaced. Get an OEM SGF or OE MB replacement (made by SGF).

1675175616525.png
 
I agree with Gerry, at this point, you already have it all apart, and with cracks and shredding sleeve - replace it!

Regards,
D
 
This was my first thougt - replace, but I prefered to double check. I have Febi on the way, as per seller it is reboxed SGF with grinded off 129.... number. We will see, I can always send it back.
 
Generally FEBI is pretty consistent with offering OEM SGF flex-disc product, so likely what you will be getting will be the real deal.
 
Bad news... the Febi flex disc kit 129-410-01-15 appears to be OOS [as of Jan-2023], possibly NLA, from all vendors in USA. Hopefully you can still get them in Europe.

Otherwise in USA the dealer list price is $310 and discount dealers are $200-$230 each. Looks like Europe dealer pricing is ~€275 including VAT?

Worse news... the part number doesn't appear at MBCC anymore (link), which is often a bad sign, possibly indicating impending NLA. Would need a dealer to check worldwide inventory in Paragon, and also check for possible NLA codes in Paragon.

UPDATE: The MBCC website was showing "Available" in October 2023, but NLA again by summer 2025. And, the Febby Flex Disc is available from FCP/RME/AHAZ/etc again, it was just OOS temporarily.

:relieved:
 
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Bad news... the Febi flex disc kit 129-410-01-15 appears to be OOS, possibly NLA, from all vendors in USA. Hopefully you can still get them in Europe.

Otherwise in USA the dealer list price is $310 and discount dealers are $200-$230 each. Looks like Europe dealer pricing is ~€275 including VAT?

Worse news... the part number doesnt appear at MBCC anymore (link), which is often a bad sign, possibly indicating impending NLA. Would need a dealer to check worldwide inventory in Paragon, and also check for possible NLA codes in Paragon.

:runexe:
I wonder if Mopar 5142478AA is the same thing? See this ebay listing:

Drive Shaft Coupler for 300, Challenger, Charger, SLK55 AMG, Magnum+More 935-502 | eBay specifically the "applications" section. They list many MB and Chrysler applications:
1675234083319.png
1675234096260.png 1675234110314.png 1675234123531.png 1675234134784.png 1675234145588.png 1675234155854.png

When plugging this part number 5142478AA into Amazon, I get this…..SGF markings.

https://www.amazon.com/Dorman-935-502-Driveshaft-Coupler/dp/B005VTT62I --- a DORMAN part, but zooming in on the picture yields this... 1675234227437.png1675234248995.png 1675234268227.png

.. So I wonder what happens if one orders the Mopar part from a Mopar dealership???
 
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I wonder if Mopar 5142478AA is the same thing? See this ebay listing:

Drive Shaft Coupler for 300, Challenger, Charger, SLK55 AMG, Magnum+More 935-502 | eBay specifically the applications section. They list many MB and Chrysler applications:
View attachment 160832
View attachment 160833 View attachment 160834 View attachment 160835 View attachment 160836 View attachment 160837 View attachment 160838

When plugging this part number 5142478AA into Amazon, I get this:

https://www.amazon.com/Dorman-935-502-Driveshaft-Coupler/dp/B005VTT62I --- a DORMAN part, but zooming in on the picture yields this... View attachment 160839View attachment 160840 View attachment 160841

.. So I wonder what happens if one orders the Mopar part from a Mopar dealership???
Great detective work, kid Sir! I discovered the same this morning, was just about to post, Amazon indeed a better price, Autozone has them also with 20% off

1675252787720.png


1675253081717.png
 
I wonder if Mopar 5142478AA is the same thing? See this ebay listing: Drive Shaft Coupler for 300, Challenger, Charger, SLK55 AMG, Magnum+More 935-502 | eBay specifically the applications section. They list many MB and Chrysler applications:
The MB kit 129-410-01-15 fits a bazillion applications... most all 129, 140, and a ton of other/newer chassis. EPC screenshot below is only for North American applications. I hadn't thought about the Chrysler fitments though - great idea! But... keep reading.


When plugging this part number 5142478AA into Amazon, I get this:

https://www.amazon.com/Dorman-935-502-Driveshaft-Coupler/dp/B005VTT62I --- a DORMAN part, but zooming in on the picture yields this...
I found that as well when researching a couple weeks ago. However... until someone orders a Dorman to confirm what's in the box, it's still a gamble. I found other reports of rapid Dorman failures, which combined with the very low price, makes me suspicious that Dorman is 'borrowing' an old photo. Click here, read the Amazon reviews - sort by "most recent". Kind of like the oil filter fiasco a couple months ago, showing OEM in the photo but delivering no-name in the box. Click here to see at least one photo of Dorman that is clearly NOT SGF.

Also could be Dorman initially was reboxing SGF when they created their part number, but later changed suppliers. I'm not sure. Anyone want to give Dorman a try and report back?



.. So I wonder what happens if one orders the Mopar part from a Mopar dealership???
OE Mopar SHOULD be an SGF Germany flex disc. Oddly, most photos of the Mopar disc show 3 bolts, not 4 or 8? The included bolts may or may not be the correct length but you can often re-use the old hardware.

BUT... searching online, I'm finding many/most suppliers of the Mopar OE # 5142478AA to be OOS. Some dealers are showing NLA (link1, link 2, link 3). Hmmm.


1675260047646.png
 
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SKF's website shows a part number for the Mercedes application... but I can't tell if this is new or old information, as there's no date on the page. There's almost zero search results for SKF # VKJF98034.

MB # 129-411-00-15 is for the bare disc, with no hardware.
MB # 129-410-01-15 is for a kit with disc plus hardware.


1675261316064.png

1675261072031.png
1675261113939.png
 
...
OE Mopar SHOULD be an SGF Germany flex disc. Oddly, most photos of the Mopar disc show 3 bolts, not 4 or 8? The included bolts may or may not be the correct length but you can often re-use the old hardware.

BUT... searching online, Im finding many/most suppliers of the Mopar OE # 5142478AA to be OOS. Some dealers are showing NLA (link1, link 2, link 3). Hmmm.

Yeah! My thought was not so much Dorman, but that perhaps buying an authentic MOPAR 5142478AA might yield the same flex disc!
I hear you thought that Mopar dealers don't see to have this part in stock either. Perhaps this is a SGF production / supply chain limitation rather than MB NLAing the flex disc?
I can't imagine ChryCo, I mean, Pentastar, I mean, FCA, I mean, Stellantis (am I supposed to call them Stellantis now?) NLAing the flex disc with all the 300s/Chargers/Challengers on the roads...
 
Perhaps this is a SGF production / supply chain limitation rather than MB NLAing the flex disc? I cant imagine ChryCo, I mean, Pentastar, I mean, FCA, I mean, Stellantis (am I supposed to call them Stellantis now?) NLAing the flex disc with all the 300s/Chargers/Challengers on the roads...
I know, right? The odd thing is, MB would normally have a supercession if there's a new/different version of the disc coming from SGF. Maybe that's in the works, but the part number MIA on Classic is worrisome. I wonder if there's any discussion on the various Charallenger forums.

:scratchchin:
 
Does the mb 129-410-01-15 fit on a 1993 500e?
Yes, one each front & rear. This is the kit with bolts, washers, and locking nuts. AFAICT these may still be available from Mercedes, but inventory may be limited. Someone would need to ask a dealer to confirm. Discount dealers have the kits for ~$225 each.
 
Yes, one each front & rear. This is the kit with bolts, washers, and locking nuts. AFAICT these may still be available from Mercedes, but inventory may be limited. Someone would need to ask a dealer to confirm. Discount dealers have the kits for ~$225 each.
Ordered one from the MB Husker folks this morning and they processed and confirmed the order. If stuff is NLA they usually process the order and then send a cancellation. So I'm somewhat optimistic that these can still be bought from the discount MB dealers
 
I cant imagine ChryCo, I mean, Pentastar, I mean, FCA, I mean, Stellantis (am I supposed to call them Stellantis now?) NLAing the flex disc with all the 300s/Chargers/Challengers on the roads...
Yes, exactly!!! God knows there are plenty indeed!

Thank you so much @Duh_Vinci for contributing to our science investigations here!!!!
I'm curious as all of you about these "mystery" parts, and considering reboxing inventory/situation is not always identical in term of actual parts inside the boxes, I figure why not, from 2 sources, both should be quickly delivered, and I still have 2 years old SGF (FEBI reboxed) to compare to these Dorman's.

Will report as soon as I get these...
 
BTW - I have fuel pumps and filter assembly apart, I'll be sending their brackets for zinc coating. What coulor they should be - silver or gold? I thought all parts were zinc (cadmium) coated gold from the factory but these brackets seem to be silver originally... Can you please advise?
 
BTW - I have fuel pumps and filter assembly apart, Ill be sending their brackets for zinc coating. What coulor they should be - silver or gold? I thought all parts were zinc (cadmium) coated gold from the factory but these brackets seem to be silver originally... Can you please advise?
I think those 2 brackets were silver? Bummer that 1 is still available new (and cheap!), but the other is NLA.
 
Ok, the first set arrived, these 2 delivered by Fedex from Autozone... I thought I had a FEBI to compare it to, but nope, just remembered that when I changed the center/carrier bearing, I've replaced the flex discs too.

Luckily, this detailed post shows fine pictures form just about every angle of factory MB parts Rear Flex disc? | Transmission and Driveline

And here is Dorman 935-502...

image_123923953%20%281%29-X3.jpg

image_6483441%20%281%29-X3.jpg

image_6483441%20%282%29-X3.jpg

image_6483441%20%283%29-X3.jpg

This is where the MB Factory part would be included in raided letters

image_123923953%20%283%29-X3.jpg

And this is where the factory MB Star symbol would be in the raise letters

image_123923953%20%282%29-X3.jpg

So from what I can tell, and correct me if I'm wrong, these are the very same factory SGF pieces supplied to MB and by MB to us (less the ground off part number/lettering/symbols)... Granted, NO hardware included, but original parts and a fraction of the cost.

Amazon's order comes in tomorrow, will report.

Regards,
D
 
That is fantastic! Only remaining question is if there is mixed inventory, i.e. if some Dorman is SGF, while other Dorman is no-name. Looking forward to your Amazon order review.

I'm seeing $78 each at Autozone (link), is that correct? There's a 20% qpon on $100+ orders.

:jono: :yahoo:
 
That is fantastic! Only remaining question is if there is mixed inventory, i.e. if some Dorman is SGF, while other Dorman is no-name. Looking forward to your Amazon order review.
Indeed! That is the question. BTW, the other place has these in stock is Rockauto at $63.79, there is 5% 224117750185169165, these also have visible SGF markings on the page info photos More Information for DORMAN 935502

Im seeing $78 each at Autozone (link), is that correct? Theres a 20% qpon on $100+ orders.
Yes, that's the one coupon is TIME4WINTER shipping is free

1675253081717-png.160856
 
Rock Auto is a gamble. As we found with the oil filter fiasco, at a minimum we'd have to pay shipping both ways to send back the Dormans if they aren't OEM. Remember that the Dorman photos are generic/stock photos, and don't necessarily represent current inventory on the shelf. Like with the oil filters.

:peep:
 
Rock Auto is a gamble. As we found with the oil filter fiasco, at a minimum wed have to pay shipping both ways to send back the Dormans if they arent OEM. Remember that the Dorman photos are generic/stock photos, and dont necessarily represent current inventory on the shelf. Like with the oil filters.
Filters, yes, totally forgot! That was something! Amazon's order says shipped, said to be here tomorrow, will report with details...
 
Ok, the Amazon order... exact the same SGF/GAD markings and ground off MB star and the part numbers. These looks like came directly from Dorman to amazon first, no middle man

IMG_2552-X3.jpg IMG_2553-X3.jpg IMG_2554-X3.jpg IMG_2555-X3.jpg IMG_2556-X3.jpg IMG_2557-X3.jpg

So for now, both, Amazon and Autozone are spot on this re-boxed factory SGF pieces... Is their full inventory identical or as Dave said

mixed inventory, i.e. if some Dorman is SGF, while other Dorman is no-name.
At this price, I'm keeping both sets, who knows, maybe once the value reaches the target of 5000€ (set by @gerryvz ), I may trade a set for NLA Lemforder motor mounts? :yayo:

Regards,
D
 
I ordered a couple as well, although Amazon is showing delivery by March-1. (!?) Fingers crossed.

🤞
What? March 1?

I JUST peeked at Amazon after I read your post. See below. Delivery for Feb 5.
Let me guess. When you said "ordered a couple" what you really did was order 100 sets, thus blowing through Amazon's current balance on hand (4) thus causing them to special order 100 pcs from Dorman, thus giving you a March 1 estimate? 🤣

1675471139428.png


PS @Duh_Vinci --- You are 3 hours ahead of me right? So how come I have 7 hrs 25 min to order for delivery by Sunday, but you only have 1 hr 55 min to order for delivery by Sunday?

Can we infer from this that AMZN's distribution center for these Dormans is farther from the east coast than it is from the west coast? 🤨
 
Huh??? Are we on the same Amazon? Just checked a min ago...
I know, right? On the product page, it shows Feb-9:

1675471613143.png

But on the ORDER page, it changed!

1675471677511.png


Let me guess. When you said ordered a couple what you really did was order 100 sets, thus blowing through Amazons current balance on hand (4) thus causing them to special order 100 pcs from Dorman, thus giving you a March 1 estimate? 🤣
Ummm. Yeah, ahhh...

200.gif




Can we infer from this that AMZNs distribution center for these Dormans is farther from the east coast than it is from the west coast? 🤨
That's a good point. Guess we'll see where the origin is when they ship!

:200.gif



UPDATE: My order shipped EIGHT DAYS later. ETA is Feb-15 via UPS Ground, and yes I have a Prime membership. Amazon is getting really lazy. :oldman:

1675878069449.png
 
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Ok, the first set arrived, these 2 delivered by Fedex from Autozone... I thought I had a FEBI to compare it to, but nope, just remembered that when I changed the center/carrier bearing, Ive replaced the flex discs too.

Luckily, this detailed post shows fine pictures form just about every angle of factory MB parts Rear Flex disc? | Transmission and Driveline

And here is Dorman 935-502...

View attachment 160998

View attachment 160999

View attachment 161000

View attachment 161001

This is where the MB Factory part would be included in raided letters

View attachment 161002

And this is where the factory MB Star symbol would be in the raise letters

View attachment 161003

So from what I can tell, and correct me if Im wrong, these are the very same factory SGF pieces supplied to MB and by MB to us (less the ground off part number/lettering/symbols)... Granted, NO hardware included, but original parts and a fraction of the cost.

Amazons order comes in tomorrow, will report.

Regards,
D
Concur. The Dormans arrived today. They are individually boxed (no hardware) SGF discs, made in Germany, Western European rubber smell, with the MB part number and star ground off. Not a bad deal for $135 per pair, postage paid, after discount.

MB wants $235 each for a repair kit with hardware, with list price being $310 each.
 
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