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1990 Mercedes-Benz 300E Question: Idling problem



Jeff walker, Rochester, NY, September 07, 2010, 13:10

trouble getting car to stay idled, it cuts off after taking foot of gas pedal

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  • Answer #1

    Visitor, December 12, 2010, 01:54

    I had a similar problem with my 90 300E. It would occasionally stall and idled roughly. I took it to a European specialized repair shop to have it tuned, distributor changed, new spark plugs and wires. I was disappointed when I received it back with the rough idle and occasional stalling continuing.

    Fiddling around, I was looking under the hood. To the right front, behind the headlight, I found what appeared to be some sort of smog or air mixture devices. Looking closer, I found the vacuum lines to be cracked and aged/weathered. I bought 4mm vacuum hose and replaced each end (less than a foot of hose). From there on, it starts much better, rough idle is gone, no stalling, and accellerates very nicely now.

    It's worth a try to look and very inexpensive fix. Hope this helps.

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