NH, If you read the archives you'll find that the only relief one can get is free parts or free labor negotiated from the dealer, and probably only if you give the dealer a lot of business. MBUSA will not admit to this problem.
I've urged people to file a complaint about this problem to the NHTSA. A high number of complaints may get some action from the governing agency. Here's the complaint form
Remember that NHTSA is concerned only with safety. So it is the safety aspect (stalling in traffic) that should be mentioned in the complaint.