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Q:

On the subject of the MAF, can this also cause the car to stall when braking... on 1997 Mercedes-Benz S420

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or lunging forward when braking?
(1) Answer
The MAF can cause lots of bucking & jerking & stall/hard start issues. So can a combination of bad motor mounts and cracks in the intake hose(s) that open and close as the engine shifts around , causing a fluctuation in the MAF reading. Best to diagnose for all conditions first , before replacing part(s).