If the MAFS is certified OK then it's the front Lambda sensor that gone that plays and equal part in the fuel/air flow and certainly needs checking.
I have just put a link on my site to a company offering lamda's for the 'A' Class at less than MB prices same item AND I got my readers 5%off as well so take a look at my page 34
Bert Rowe's-Mercedes-Benz 'A'-class info. Components Parts 160/2002 Exhaust Gas System
If your not confident that the problem isn't the MAFS then do as I said and sent it to roger at ECU testing for checking £35.00 and you will have peace of mind that the MAFS is OK if it's not get them to repair it and ask BBA for your money back. see all the contact details on my page 38
I also mentioned the fact that 'ECU testing' can repair your ECU so if the fault lies there they can deal with it you will get 15% off the cost of any repair or charge if you mention my site. I can't see the point of using BAA as they can only check and repair the MAFS if the fault lies in the ECU you have to send it elseware.
If you want to pay full price as I suspect you did at BAA then don't bother .The 15% discount applies to BBA reman as well BUT you must mention my site to get it , it's not automatic.
Lofty
