Help!! 300e idle fluctuation - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 06-26-2011, 02:32 PM Thread Starter
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Vehicle: 1991 Mercedes Benz 190E
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Unhappy Help!! 300e idle fluctuation

My '87 300e with around 290k has recently, after initial start up in the morning, go back and forth between 500, and 2000 rpm. If I allow it to warm up, then shut her off, wait about 10 minutes to re-start, she runs fine the rest of the day, even after cooling down for several hours, until the next morning when the process begins again. I suspected a vacuum leak, but can not find one. Any ideas would be appreciated, Mike.
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post #2 of 2 (permalink) Old 06-26-2011, 02:38 PM
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Search the W124 Discussion Forum. There are very few new or unique problems.
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