88 Mercedes 300E 5 Speed High Idle pt.1

[@Gelandelocks]

problem was solved, it was the airflow potentiometer on the air flow meter plate that was out of adjustment.

[@timvanderwouden1007]

Idle air control valve is stuck internally. I just had one do it to me. Soak the valve part in brake cleaner/carb cleaner. Common issue.

[@timvanderwouden1007]

or bad wiring. They have issues with deteriorating wiring harnesses.

[@luddebramwehl1832]

have you found the problem? I have the same problem.

[@timvanderwouden1007]

Idle air control valve is stuck internally. I just had one do it to me. Soak the valve part in brake cleaner/carb cleaner. Common issue.

[@timvanderwouden1007]

or bad wiring. They have issues with deteriorating wiring harnesses.

[@Gelandelocks]

for me, it was the air flow potentiometer that was out of adjustment. the idle air control valve was cleaned, and replaced with another good working unit. The wiring harness issue was only on the 93-95 M104 engines