The 91 300E had similiar weird running problems. Finally took it to a good tech friend and he knew immediately it was a bad coil. Changed it and the car purrs now. Hell, it should for all the parts and repair attempts I did to it.

Haasman

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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)