I have a 1991 300E 4 door. The car only has 50,000 miles and I am second owner. When starting in the morning the car idles at 700 RPM. As it warms up the idles speed goes from 700 to 1500 and sometimes up to 2200. The dealer has replaced the Airflow mixture sensor and still idles funny. Any ideas?
Tom Viemont
100 miles south of Chicago on Rte 66