Problems with the pneumatic system can cause closing assist and door lock issues.
Resources for the Repair and Maintenance of your Mercedes-Benz 500SEC
Mercedes-Benz 500SEC Models:
Mercedes-Benz 500SEC Problems
The bushings for the shifter lever wear out to the point where they break and fall out. This causes excessive movement (loose feel) in the shifter lever and a clanging-type noise when changing gears.
The brakes may begin to squeak at about the 50 percent wear point. This is due to the size and material used for the brake pads and rotors. The brake rotor surfaces become uneven, causing a lip to form at the outer edge. This will generally require replacement of the rotors when the pads are worn (pad life varies depending on driving style and terrain).
As brake fluid becomes dirty over time, it can cause a failure of the anti-lock brake system (ABS) modulator assembly. Our technicians recommend a complete brake system flush every two years to help prevent this issue.
A coolant leak may develop form the Radiator due to degradation of its plastic components. Replacement of the failed radiator will be necessary.
Mercedes-Benz 500SEC Questions and Answers
The driver's side auto heating function does not blow hot air. The passenger side works fine. The Air Conditioning works fine on both sides of the car when using the automatic setting.