Im in the same boat as you are and we are looking at a E or a C. I was talking to my indy and he mentioned something about cam codes on the 2010 and earlier. Apparently he said that the cam gears and axillary gears were made out of an inferior metal and were prone to failure. He thought the problem was fixed by 2011 but he was not sure. This was in the V6 for the E class BTW.

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