Mercedes-Benz Forum - View Single Post - 99 S420 Skips Heart Beat @ 70mph
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post #7 of (permalink) Old 03-20-2018, 09:05 AM
Mlthoma
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Date registered: Dec 2014
Vehicle: 96 S420
Location: Albuquerque, New Mexico, USA
Posts: 74
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Quoted: 18 Post(s)
Al,

Mine displayed exactly the same behavior when I got it, like it shuts down for a split second and then goes on as if nothing had happened. Most of the time it doesnt cause a problem, but if it happens when your going slow it may stall completely. It used to happen once or twice a day. It didnt throw a CEL. It was the MAF sensor. SDS showed a MAF error so I swapped the one off my parts car and it's never happened again.
CEL can be cleared by most any handheld OBD2 scanner or autozone.

Hope this helps.

Mike in ABQ
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