C63KES

Hi all
I just bought a well maitained, low mileage 14000 miles, 2011 C63; just starting to enjoy this awesome car.

I noted while driving around that there appears to be a somewhat high pitched ? gear/differential whine, noticeable only at low speeds in lower gears; is this normal for the vehicle. Per the service records, the differential was checked by the dealer at the first 10K service; this is a regular c63, with out the limited slip diff or performance package. Previous owner knew of no problems. Is this something I need to worry about?

Thanks.

m a x i m u s

congrats on the car. are you sure the whine is from the diff? these engines emit a whiney sound that is noticeable until the exhaust noise kicks in.

C63KES

Thanks; this noise/whine is subtle, and heard only when going slow in lower gears; having no experience with this car, I was not sure that this was a 'problem'. The car otherwise seems to drive fine.That is why i thought i'd ask you folks- looking for some reassurance.
I have come form a manual Audi A6 , and while it does have gear noise in reverse, could not replicate this type of noise. I may go to the dealer, as it is still under warranty, but usually dealers are not responsive until your warranty runs out.

m a x i m u s

I just realized your car still had warranty and I was about to suggest taking it in to the dealer if you want to be sure. I've never heard any whine from my diff, tho.

got any pics of the car?

C63KES

Re-reading Maximus' response about 'whiny' engine noise, it may be that this is just engine noise that is masked by other noises(exhaust etc) that drown it as I drive away; it is also noticeable while decelerating at lower speeds; gears shift very smoothly though.
The Audi A6 2.7 turbo is an extremely quiet( good and bad!) and reasonably torquey engine after 135000 miles. I am aware that the 156 is a much higher stung engine though.

C63KES

Hi Maximus
Per auto-check, the dealer has 'checked' the differential at the first 10,000 mile service; reading the required maintenance manual, this is not listed- does that mean they suspected something. it is required that a C63 with limited slip rear needs a diff oil change at 2000 miles. Any comments? Thanks.

Merc63

Why was the diff check previously? Contact the dealer that did the check to find out.

There is no checks on the diff unless u have LSD, then it's an oil change at. 2000 km