Quote:
Originally Posted by benzguy1987
I had the exact same problem with my '90 420SEL. Turned out to be the mass air meter. Replaced EVERYTHING but that. Finally had to bite the bullet and get it replaced. The rubber diaphragm inside had deteriorated and torn.
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Even if the mass air meter was bad it should be able to drive and idle while it is in closed loop. The computer is not using the mass air meter until it is warmed up. I really hope that this is not the problem as I will not spend that much more money on it. Time for a new car.