I'm amazed at all these problems. I have had my C240, six speed since last October and have put almost 14,000 miles on it. It developed a rattle in the right rear which turned out to be a shock and was, of course, replaced at the first A service.
The car is tight, drives great, looks great and is virtually flawless.
Too bad MB North America is harassing Mshop. Means I'll never buy another car from the jerks.
Your dealer should take care of your problems. In the US they certainly would.