slight whistle/squeak coming from rear during slow initial acceleration
it's definitely coming from the rear end of the vehicle and is very intermittent.
two things that came to mind are stuff on the rotor after braking or some sort of vac controlled valve setup on the exhaust that is whistling a bit.
'09 C 63 with ~4600 miles.
thanks.
Whether or not this is your problem, I do not know, but the fact remains.



