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94 c280 has engine surge while at idle or at low eng rpm. have been to a garage and cannot repair. have not been to dealership yet. seems to be
the worse while stopped and trans in "drive". engine surges from idle speed, 600 rpms, to 800 rpms. seems to be worse after the car has warmed up. have noticed a stronger than normal sulfer smell from the exhaust. replaced the two exhaust sensors within the last year. auto has 80k miles. please email response to [email protected]. thanks for any help.
 

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C280 Engine Surging

Sorry I can' help you, but was wondering if you ever solved the problem.

I have a 95 C280 and it began doing the same thing 4 months ago. The garage has replaced a major computer card without correcting the problem completely. The other day they adjusted the idle arm to increase the RPM at idle to 800 (650 when shifted into Drive). First impression was that this helped but got some surging up to 1100 later that day.

Frustrated!!

Looking forward to hearing from you.
 
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