I have a 2001 ml320, the check engine light keeps coming on. Went to autozone, had the code read. It was P0173. They cleared it out and everything was fine for a couple of weeks. The light has came on again, and has gone off again on its own. But i noticed it would come on after a hard acceleration, but not immediately. I may drive 5 miles before it comes back on. Is it the MAF sensor I keep reading about? Thanks for any help