C63S Overall reliability
- Interior rattles upon delivery
- brakes squeal (ceramic pads squeal when used as a daily driver so that's not really a "problem" persay)
- a few instances of the rear differential failure (but I can't find any detailed info as to WHAT failed, I know theres a recall for the 15-17 cars having some supporting structure cracking)
Is there anything else I should really be concerned about? I'm just not finding anything...




And again, voiding that warranty... lol. So none of that really matters to me. I jumped through all the hoops to have a drivers license in middle of nowhere nevada for a reason
Last edited by Brettboat; Dec 7, 2018 at 10:48 AM.
-I did a rear diff at 1800 miles
-Low coolant warning at 5500 miles (just dropped by the dealer to top it off)
-Very seldom but I couldn't hear audio from the MB sound system despite the volume and it being on (researched this and seem like it's not an isolated issue with this model). When i park and restart the car it goes back to normal
-Wiper Chatter (common)
Build quality feels solid with not much rattles at all. I had the coupe and FWIW, it was built in Germany. Followed proper break-in procedure for the first 1000 miles.
Very happy with the car otherwise. My conti's were already shot at 8000 miles so switching to michelins.
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-entire steering colums replaced under the warranty
-rear wheel barings replaced under the warranty.
I currently got 32K miles on it
The Best of Mercedes & AMG
0 problems with the engine, trans....
The only problem I have is rattles, fixed 95% percent of it myself
Face lift c63s is your best bet if you don't want any problems like rattles. Pre face lift will always have a lot of bugs
Only repairs so far are replacement of the battery and replacement of the capacitor that powers the Auto Start/Stop feature (which I never use anyway).
Other than that, the car has been flawless.
Also, the differential issues you referred to has been addressed with a recall that updated the traction control's software. When people were driving hard on slippery roads (especially with launch control), the traction control would cut in abruptly and the shock/force caused by the abruptness could cause structural damage to the rear diff. Problem was solved by software that isn't as abrupt with applying traction control.
Last edited by msd3075; Dec 9, 2018 at 02:35 PM.
1. A small line (2 inches) of clear coat on the quarter panel (gas tank side) was bubbling. It was wet sanded and re-cleared by a bodyshop the dealer work with. This was covered under warranty.
2. Turbo is rusted but dealer says normal due to where I'm from which resulted in humidity during summer months. The car runs fine so I will take their word for it. I did start a thread about this and other members does have this issue too. This is a result of the turbos being cast iron. It is suggested to drive the car hard to burn off the rust.
3. Passenger side window would not go up fully. It would go about 3/4 of the way then it retracts downward. This was fixed by dealer under warranty.
1. A small line (2 inches) of clear coat on the quarter panel (gas tank side) was bubbling. It was wet sanded and re-cleared by a bodyshop the dealer work with. This was covered under warranty.
2. Turbo is rusted but dealer says normal due to where I'm from which resulted in humidity during summer months. The car runs fine so I will take their word for it. I did start a thread about this and other members does have this issue too. This is a result of the turbos being cast iron. It is suggested to drive the car hard to burn off the rust.
3. Passenger side window would not go up fully. It would go about 3/4 of the way then it retracts downward. This was fixed by dealer under warranty.
Last edited by Brettboat; Dec 11, 2018 at 10:07 PM.
Last edited by johnstahhh; Dec 11, 2018 at 10:12 PM.
No one here is into racing I'm assuming?
As for the naysayer above me... I don't believe that for a second... Uncoated turbine housings rust. They have no protection and they get 1300+ degrees F
Last edited by Brettboat; Dec 14, 2018 at 12:57 PM.
The sunroof did not sit flush at one corner. Fixed under warranty.
The chrome trim piece on the transmission stalk on the steering column came loose and was buzzing/rattling loudly. Fixed under warranty.
I got a low coolant warning a few months ago. I was worried that I had an intercooler leak, but it just needed a top off.
Current issue: there's a bit of a rattle from inside the driver's door if I go over a bump with the window down. Either something is slightly loose or needs to be adjusted. The dealer will take a look the next time it goes in for service.
That's it. So far it's been very reliable.





