Front Differential
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 71
Likes: 4
From: Indiana
2009 C63 AMG
Front Differential
Looking good for a little help here. I took the GLS550 to the shop for what I thought was a wheel bearing. After diagnosing the issue they said the noise was coming from my differential and that they do not do this service. The noise is almost like a road whine.
Questions:
Without much further diagnosis, Is it worth changing the fluid to see if the issue resolves itself?
If I do the fluid change, what is the part number for the drain plugs?
Is the fluid change as simple as
Unscrewing the top plug
Unscrewing the bottom plug
Draining and refilling
Questions:
Without much further diagnosis, Is it worth changing the fluid to see if the issue resolves itself?
If I do the fluid change, what is the part number for the drain plugs?
Is the fluid change as simple as
Unscrewing the top plug
Unscrewing the bottom plug
Draining and refilling
MBWorld Fanatic!
Joined: Jun 2021
Posts: 1,919
Likes: 522
From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
Looking good for a little help here. I took the GLS550 to the shop for what I thought was a wheel bearing. After diagnosing the issue they said the noise was coming from my differential and that they do not do this service. The noise is almost like a road whine.
Questions:
Without much further diagnosis, Is it worth changing the fluid to see if the issue resolves itself?
If I do the fluid change, what is the part number for the drain plugs?
Is the fluid change as simple as
Unscrewing the top plug
Unscrewing the bottom plug
Draining and refilling
Questions:
Without much further diagnosis, Is it worth changing the fluid to see if the issue resolves itself?
If I do the fluid change, what is the part number for the drain plugs?
Is the fluid change as simple as
Unscrewing the top plug
Unscrewing the bottom plug
Draining and refilling
It's an easy procedure.
Remove fill plug
Remove drain plug
Capture old fluid
Install new drain plug, p/n A1643310056, torque 35Nm
Fill new fluid using Motive tool or equivalent
Install new fill plug, p/n A1643310056, torque 35Nm
DIY and WIS: https://mbworld.org/forums/gle-class...ml#post8345443
Last edited by chassis; Mar 29, 2025 at 02:18 PM.
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 71
Likes: 4
From: Indiana
2009 C63 AMG
MBWorld Fanatic!
Joined: Jun 2021
Posts: 1,919
Likes: 522
From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 71
Likes: 4
From: Indiana
2009 C63 AMG
I did get the car into another shop this past week. I dropped it off at 8am and got a text that they needed me back at the shop at noon. When I came back, the owner/lead tech said he has never seen an issue like this. He said that my front and rear diff's were shot. He had me listen with his stethoscope so that I could hear the grinding. 2 remanufactured diff's with 4yr warranty is going to cost roughly $8500.
I have had the car in the garage trying to figure out next steps. I am half temped to try the replacement myself, but I can't seem to find any good tutorials.
Trending Topics
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,281
It almost feels like you are driving on a rough road with road noise, like a drone sound on the interior. You can also feel it in the pedal.
I did get the car into another shop this past week. I dropped it off at 8am and got a text that they needed me back at the shop at noon. When I came back, the owner/lead tech said he has never seen an issue like this. He said that my front and rear diff's were shot. He had me listen with his stethoscope so that I could hear the grinding. 2 remanufactured diff's with 4yr warranty is going to cost roughly $8500.
I have had the car in the garage trying to figure out next steps. I am half temped to try the replacement myself, but I can't seem to find any good tutorials.
I did get the car into another shop this past week. I dropped it off at 8am and got a text that they needed me back at the shop at noon. When I came back, the owner/lead tech said he has never seen an issue like this. He said that my front and rear diff's were shot. He had me listen with his stethoscope so that I could hear the grinding. 2 remanufactured diff's with 4yr warranty is going to cost roughly $8500.
I have had the car in the garage trying to figure out next steps. I am half temped to try the replacement myself, but I can't seem to find any good tutorials.
MB World Stories
The Best of Mercedes & AMG
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
MBWorld Fanatic!
Joined: Jun 2021
Posts: 3,110
Likes: 1,346
From: Fleriduh
W212 E63S Wagon - GSL580 - E63 - E350 - C300
Thing to know....we had a TOTAL service done on ours. After the service the diff rear seal is leaking a drip (here and there, so the story goes). The fix? Easy, the part...under $5.00....the "Special Tool" required to press in the gasket was like $300 and the labor is way outta hand.
Thankfully my shop/mechanic are also friends......the commenters about changing the fluid first? I agree with them 100%. It is a cheap and easy experiment.
Thankfully my shop/mechanic are also friends......the commenters about changing the fluid first? I agree with them 100%. It is a cheap and easy experiment.
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 71
Likes: 4
From: Indiana
2009 C63 AMG
Thing to know....we had a TOTAL service done on ours. After the service the diff rear seal is leaking a drip (here and there, so the story goes). The fix? Easy, the part...under $5.00....the "Special Tool" required to press in the gasket was like $300 and the labor is way outta hand.
the funny thing is, is that I have 0 leaks. From the exterior, everything looks good.
Last edited by Pwhitty; Apr 21, 2025 at 09:29 AM.
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,281
Thread Starter
Junior Member
Joined: Feb 2019
Posts: 71
Likes: 4
From: Indiana
2009 C63 AMG
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,281
