Although the "Garden State" gets a lot of grief it still has some good traits... one of those "good things" is the gas station attendants!
Some others are the swamps, and the Bada Bing. Kidding.
Enough with slamming Jersey... I did have my mass air sensor replaced and the light still went on. I'll make a point of replacing the gas cap if the light pops on again, and if that does not work then maybe the oxygen sensor. I'm through with my dealer also.
I do occasional services with them to give the impression the vehicle has been "maintained" by the dealer.
How many oxygen sensors are in the tank??
BTW: I thought only Benz dealers could check codes??
Cheers...
Mike