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1997 Mercedes-Benz E420 Question: Idling speed uneven especially on summer days - occasionally the engine cuts off

 

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luvmyE420, Herndon, VA, January 14, 2013, 16:37
 Rookie

When I come to a stop at a light or sign, the engine idling becomes uneven (200rpm to 700rpm). Car shakes. On a few occasions the engine has died. Also, on some days it takes a long time for the ignition to start the engine. Sometimes when coming to a stop, the ASR light comes on. When I start accelerating during a rolling stop, there is lack of power for a few seconds. Solved the problem of long starts by letting the air come on before turning the ignition. Don't know why it works.

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