If it were my car I would run at least one bottle of Techron or similiar quality fuel injector cleaner through the system.

My 95' 320E does this. I have found if I drive it under hard acceleration (when properly warmed up) the condition goes away.

J

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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)