I have just recently joined this forum and found a few instances of people experiencing C classes pulling to the left. Last year I purchased a 2 year old C240 Avantgarde from MB in Colindale. On the initial test drive I felt the car pulled to the left but was assured by the sales person that "all Mercedes pull to the left!". A few weeks later whilst washing the car I found it had an incorrect size tyre fitted to the front left. Although the car did not have or require an MOT, I was told by an independent mechanic that it would have failed on this thus making it unroadworthy. So much for the multipoint check MB blag on about, this along with a string of other issues had been checked and approved by them in all the paper work they gave me. So check your tyres because they don't!