car wont idle, runs rough but smoothes out with added throttle.

What is your question?

No Engine Codes, no vacuum leaks, changed spark plugs twice (first autolite plat, than mercedes genuine plugs). cleaned Maf sensor, verified that MAP sensor working. OBD reader shows: Short term fuel trim reads 25, long term 0, MAP 9g, no missfires, throttle position sensor shows to be working I'm at a loss for Ideas, PLEASE HELP..

wndjmr777 in Bosque NM

Aug 14, 2011

What are the best Mercedes-Benz repair shops?

RepairPal Certified shops can diagnose and repair your 1997 Mercedes-Benz S500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.

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What is your question?

car wont idle, runs rough but smoothes out with added throttle.

What is your question?

wndjmr777 in Bosque NM

Aug 14, 2011

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What are the best Mercedes-Benz repair shops?

RepairPal Certified shops can diagnose and repair your 1997 Mercedes-Benz S500. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.