An engine oil leak may develop from the oil level sensor. Replacement of the leaking sensor will commonly correct this concern.Google+
Car Problem Reports
Mercedes-Benz C320 Oil Leaking From Oil Level Sensor
Mercedes-Benz C320 Problem
Average Mileage: 62,333 mi (37,000 mi - 90,000 mi)
Visitor, 2003 Mercedes-Benz C320, 37,000 mi
oil leaking through sensor.replaced sensor problem fixed.