ENGINE INCREASING AND DECREASING SP

1987 Mercedes Benz 300e

Tiny

vitaminenoi

May, 18, 2009 AT 4:06 PM

Engine Performance problem
1987 Mercedes Benz 300e 6 cyl Two Wheel Drive Automatic 145400 miles

When the car is cold then it starts and runs perfectly, but when is worm, after I start it, it starts to increase and decrease the speed of operation (the RPM are going up and down by itself). It happens only when is idling.
Can somebody tell my what is wrong with it?

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