Usually the leak in the oil-level float switch (located in the oil pan) is because the seal has failed (I vaguely remember is as an o-ring). Replacement is easy but the oil has to be (at least) partially drained so do it next time you pull an oil change.

There have also been reports of oil leaking through the switch. That requires replacing the switch, of course.

Finally, the switches in general appear to be very conservative. The three cars with 60x engines I've owned (two of them currently owned) have all tripped the warning light when the oil is about 1 quart/liter/litre low, instead of the 2 quarts low I was expecting. I suppose "better too soon than too late" but it causes concern where none is warranted.

Jeremy

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970