Question about 1990 Mercedes-Benz E-Class

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I have a W124 230E has idling problem, and sometimes it goes off

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Most likely caused by a dirty throttlebody! Remove the intake hose to the throttlebody and clean around the inside and the butterfly valve as well with some brake clean or similar product! Throttlebodies get gummed up by carbon build up effectively closing off the idle airgap under the butterfly valve!

Posted on Oct 08, 2010

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My Merc 230E 1991 engine went dead or ceases off while being driven after 5 to 10 minutes from start off. Can restart but caused traffic jam and very dangerous as it happens when my car is in drive mode. What is this problem and how to repair the problem. My mechanic is doing guess work.

Posted on Apr 04, 2011


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Why do my car cuts off when i get off of the asellorater

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Vehicle sometimes goes into a very high idle, 2500rpm's. Sometimes if I turn the ignition off and restart the car the idle returns to normal, but not always!

Sounds like IAC valve or idle air control valve, usually not very much, maybe $20 - $25, and are usually fairly easy to get to on top of engine on intake manifold. Good luck.

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you probably need to check the butterfly. its the compinent that controls how much air goes into the engine if it is weared than in idle state air leaks into the engine sometime more sometimes less and cause fluctuations in rpm

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