Hopefully a quick and simple one - 17 plate c63s with 7G tronic. Noticed there is a whine on a cold start and when it's cold outside. Seems like gearbox as it's in sync with the revs (don't shut me down for my uneducated guess 
). Definitely goes away when car is warmed up. I will try and take a video but in terms of the pitch it sounds the same as when pushing car quite hard and you get a similar-ish sound. Main thing for me is - something to worry about or, given it disappears when car is warmed up, not? Have warranty but don't want to rush to the dealer immediately.
). Definitely goes away when car is warmed up. I will try and take a video but in terms of the pitch it sounds the same as when pushing car quite hard and you get a similar-ish sound. Main thing for me is - something to worry about or, given it disappears when car is warmed up, not? Have warranty but don't want to rush to the dealer immediately.
