I was told by my MB dealer AND MBUSA that any work done during the warranty period is NOT covered by the 12k/12months. I was very unhappy about that and told MBUSA and my dealer that I felt I was being abused. They did not care. However, after talking to the GM of the dealership they agreed to go 50/50 on the cost of a new MAF. By the way, the MAF has been replaced only 5000 miles previous. What a crock!!! Way to go MB.
JB