I had the valve stem seals replaced several years ago along with the seal at the front of the cam. That helped consumption for a while.

The M103 motor is an oil hog. They either leak it or consume it. For years I judged this motor the way I do all of my Asian cars. Big mistake. 20 yrs. later I've gotten use to how it works.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"