There's some type of sensor on the passenger side of the engine, above the oil pan. It's leaking oil, which drips onto the exhaust pipes.

My dad and I tried to take it off and replace the o-ring, but we couldn't figure out how to take it out. We tried to gently pull it out, but it felt like it was connected to something on the inside.

This is on a 1991 420SEL.

It is the low oil level sensor.

Easiest to click on Buy Parts above, and look at a picture/drawing of the part. There is a chamber on the inside.

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Gone to the dark side

- Jeff

I seem to recall a couple of bolts on that unit, if it's the same style as on my 300SE. I think 10mm. Could be wrong.

Anyway, replace the O-ring that seals the unit to the oil pan, and there's also another o-ring that goes on the stem where the plug attaches.

I took the opportunity to clean out the unit so that the float operates freely.

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition

Friend,
To reseal the level sensor connection, you will need to R&R the sheet metel pan on that V8. I agree that a new o-ring wiil reseal the connector if it survived the tug job.

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When the people fear the government, that is tyranny. When the government fears the people, that is liberty. -- Thomas Jefferson