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 CLK430 Oil Leaking From Oil Level Sensor
Mercedes-Benz CLK430 Problem
Visitor, 2000 Mercedes-Benz CLK430, 14,350 mi
oil sensor needs to be replaced because its leaking where the oil sensor located and its annoying to see this problem.