1993 Mercedes-Benz 400SEL Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1993 Mercedes-Benz 400SEL

1993 Mercedes-Benz 400SEL 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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1993 Mercedes-Benz 400SEL Questions

My dashboard light is off on my 400SEL. How do I fix it? (3 answers)

I replaced sparkplugs and now car is backfiring, what is the issue? (1 answer)

ok hello i have a 1993 400sel it has a problem with spark plugs, I replaced with new ones and the car is backfiring. i used ngk preset spark plugs, it was running fine for a few days when i was driving it around the block, but now it has began backfiring and will not fully start... I just bought ...

door locks has stopped working, have to lock with key. (1 answer)

sometimes they work and at times do not work.

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