C63 diff
Member
Joined: Mar 2022
Posts: 98
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From: Vancouver
C63 MY15
The first thing you'd need to know to find a used replacement rear diff is to know whether or not you have the electronic diff which is in the C63 S. I'm not sure if the same diff is used on other AMG models... it's possible.
If you've had the car into MB and they have said the diff is broken then I'd be inclined to see if you can get a second opinion - the dealerships are all too keen on selling you a £4.5k part plus labour to fit it when quite often things can be repaired....
If you've had the car into MB and they have said the diff is broken then I'd be inclined to see if you can get a second opinion - the dealerships are all too keen on selling you a £4.5k part plus labour to fit it when quite often things can be repaired....
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Joined: Nov 2018
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From: San Francisco Bay Area
2019 C63CS
I take it from your post that you own the non-S, but important to specify what model year. The PFL non-S has a mechanical limited slip differential and as all LSDs do, it will wear out eventually and needs to be replaced. The locking mechanism doesn't last forever and once worn you basically have an open differential, but the car is still drivable. The FL and all C63S as mentioned above have an electronically controlled locking differential, which contains a clutch pack to control the locking ratio. Clutch packs eventually wear out, too, of course, but the e-diff does seem to last longer.
So the issue with getting a used one is that you don't know how worn it already is. I suppose if you can get one from a wrecked car with significantly less miles than yours, chances are it has a good amount of life left to it, but you don't know how the car had been driven. For all you know that used diff could be close to worn out as well.
So the issue with getting a used one is that you don't know how worn it already is. I suppose if you can get one from a wrecked car with significantly less miles than yours, chances are it has a good amount of life left to it, but you don't know how the car had been driven. For all you know that used diff could be close to worn out as well.
Last edited by superswiss; Apr 9, 2023 at 07:24 PM.
Out Of Control!!
Joined: Nov 2018
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From: San Francisco Bay Area
2019 C63CS
That seems low mileage for the diff to be worn out. If you don't mind me asking, what is actually wrong with it, or what are the symptoms that lead to the diagnosis that your diff is gone?
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MBWorld Fanatic!
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2019 AMG GT R
At what mileage would you expect the electronic diff to get worn out? Would it just be the clutch pack you replace then or the entire thing?
Do you know what the symptoms would be of a worn out diff? Thanks
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Out Of Control!!
Joined: Nov 2018
Posts: 11,400
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From: San Francisco Bay Area
2019 C63CS
I haven't really seen any data on the typical lifetime of these diffs. Don't really read of many having to replace them unless they are malfunctioning. In theory if you can find somebody willing to rebuild the e-diff, then yes, essentially you only have to replace the clutch pack. Mechanical LSDs can also be rebuilt, but dealerships likely will just wanna replace them and not rebuild them.
The symptoms of a worn locking differential is that it will always act as an open differential, so you'll get one wheel spin and traction problems, because the diff isn't locking and sending torque to the wheel with traction.
Last edited by superswiss; Apr 15, 2023 at 12:26 PM.
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Joined: Apr 2023
Posts: 4
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From: England
W205 c63
my diff was completely destroyed all the cogs inside were worn out or the teeth were broken off so I had to get one from Germany so hopefully this one is better
Out Of Control!!
Joined: Nov 2018
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From: San Francisco Bay Area
2019 C63CS
