My money is on the Mafs sensor, DONT go to MB they will charge you £1400 for a new ECU/mafs remove it your self follow the direction on my site and sent it to ECU testing they will test prior to repair and you will get 15% off the repair if you mention my site, repair charge is £250.00 less the 15% or £35.00 less 15% if they test and find it's ok, They will turn it round in three four days and you can refit it yourself, haveing fitted it and connected the battery turn on the ignition On and allow to stand for a full minute before trying to start this will allow the ecu to connect to all components on the car and the chances of the ignition light remaining on after re-connection are far less.
Please post feed back and tell us how you get on .
For further information on this subject go to :-
Bert Rowe's-A-class info. ECU/MAFS Problems, Breakdowns, Symptoms, Cure, Cost, special discounts.
You could also use BBA Reman whose price is now cheaper with the same discount, but you must mention my site when placing the order or you will be charged the full price.
Good luck
