I have recently bought an 05, C270 Avantgarde with 32K miles. The car is in such brilliant order that I wasn't really paying much attention to the engine sound during the test drive - the route, anyway, was pretty flat and wouldn't have highlighted this issue. However, after a few hundred miles this has definitely become an issue. The background throbby sound is quite pleasant; the performance is more than adequate but both of these aspects are subordinated by a chattery noise under light acceleration, replaced by a tappety sound in syncro as the revs rise under hard acceleration.
So, to get to the point. A search reveals one or two members with similar experience but, unfortunately no one lists the cause/cure?
It really is a pity that the noise is so intrusive, as the car, otherwise, ticks all of the boxes for me. It's also a brilliant looker IMO.
So, to get to the point. A search reveals one or two members with similar experience but, unfortunately no one lists the cause/cure?
It really is a pity that the noise is so intrusive, as the car, otherwise, ticks all of the boxes for me. It's also a brilliant looker IMO.