Mercedes-Benz S420 Problem Report
Mercedes-Benz S420 High Usage Vehicles May Experience Ignition Lock and Tumbler Failures
Due to wear, high usage vehicles can experience ignition lock and tumbler failures. The ignition lock cylinder will generally require replacement to correct this concern.
Not fixed yet. - 521
key ignition would stick at times/unable to turn key to start vehicle. Replaced ignition lock tumblers - solved the problem. - Visitor
High mileage vehicles may develop a leak from one or more of the transmission oil seals.
Problems with the pneumatic system can cause closing assist and door lock issues.
My power locks and trunk won't lock. I have to manually lock doors and strap trunk down. I chec...
the car wont start or the ignition wont release key
The electronic throttle assembly may suffer an electrical failure. It is often cheaper to send...