Mercedes-Benz 500SEC Repair and Maintenance

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

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Mercedes-Benz 500SEC Problems

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.

Tandem Hydraulic Pumps May Leak From Either Section

Some models have tandem hydraulic pumps—one section for power steering and the other for suspension adjustment. These pumps are prone to leakage from either section.

Premature Tire Wear Due to Cracked Lower Control Arm Bushings

The lower control arm bushings can wear and crack, resulting excessive movement at the control arm pivot point, leading to irregular and premature tire wear. Worn Ball joints can also cause similar tire wear symptoms. I some cases it may be necessary to replace the lower control arm, including bushings & ball joint to correct this concern.

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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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