Check your oil level sending unit on the side of the oil pan. The old 190e was also having a similar problem. It turned out to be a brittle O-ring on the sending unit. Less than a dollar and twenty minutes of time.

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)