High mileage or older vehicles commonly develop leaks from the differential seals and/or cover. Our technicians recommend a complete reseal of the differential unit whenever these leaks are repaired.Google+
Car Problem Reports
Mercedes-Benz C240 4MATIC Leaks Develop at Differential Seals/Cover on High Mileage/Older Vehicles
Mercedes-Benz C240 4MATIC Problem
Average Mileage: 110,500 mi (101,000 mi - 120,000 mi)
Visitor, 2003 Mercedes-Benz C240 4MATIC, 101,000 mi
a slight valve cover leak developed after 100,000 miles.