Mercedes-Benz 500SEC Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Mercedes-Benz 500SEC

Mercedes-Benz 500SEC Problems

Closing Assist/Door Lock Issues Due to Pneumatic System Problems

Problems with the pneumatic system can cause closing assist and door lock issues.

Throttle Valves May Experience Electrical Failure

The electronic throttle assembly may suffer an electrical failure. It is often cheaper to send the valve to a service center for repair that to purchase a new part.

Faulty Mass Air Flow Sensor Causing Erratic Engine Operation and Poor Fuel Economy

A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engine control module (ECM) takes the wrong information and delivers incorrect volumes of fuel to the cylinders.

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Mercedes-Benz 500SEC Questions

my asr light is on and the engine has no power until i press firmly on gas pedal (1 answer)

cruise control does not work and neither does the snow chain light does not activate either

Driver's side Automatic Heating does not blow hot air? (1 answer)

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.

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