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hello all,could anyone tell me what cause,s the revs. on my s 280 to hunt,i.e go from normal idle to almost cut out and then up to 1000revs. this only happens at normal running temp. 1999 s 280 90k
 

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93 SL500, 95 SL320, 96 S320, 98 S500, 2002 E320 4Matic Wagon & A little 91 5.0 FORD Mustang
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My S320 would jump 300 RPM, and I cleaned my mass-airflow sensor with VCR chamois flat swabs and electronic contact cleaner(with no lubricant)-Mass-Airflow sensor is very fragile, and it can be defective. This solved my problem. You may have a very soiled air filter, or very dirty throttle body. Others here on the forum may have other solutions.

Hope this helps.

Martin
 
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