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Problems for specific Mercedes-Benz 500SEL years:

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Most reported Mercedes-Benz 500SEL problems

 

Verified for the Mercedes-Benz 500SEL

Instrument cluster lenses break easily.

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Verified for the Mercedes-Benz 500SEL

Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.

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Verified for the Mercedes-Benz 500SEL

The climate control system can fail or perform erratically due to internal problems with the climate control button electrical contacts. Replacement of the climate control assembly is commonly required to correct this problem.

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Verified for the Mercedes-Benz 500SEL

The head lamp wipers are easily damaged, especially by automatic car washes.

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Verified for the Mercedes-Benz 500SEL

A refrigerant leak may develop from one or more of the following AC components: AC compressor, hose manifold for the compressor, or the evaporator core. The loss of refrigerant can cause poor AC performance. Our technicians tell us that proper leak diagnoses should be performed in order to determine the cause of any refrigerant loss.

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Verified for the Mercedes-Benz 500SEL

Internal and External engine oil & coolant leaks can develop from the head gasket and/or timing cover gasket; these leaks should be repaired before the engine oil and coolant intermix which can result in severe engine damage.

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Verified for the Mercedes-Benz 500SEL

Ports in the cylinder head related to the emissions air injection and EGR systems can clog; the cylinder head should be removed and the ports cleaned.

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Verified for the Mercedes-Benz 500SEL

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

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Verified for the Mercedes-Benz 500SEL

One or more door windows may stop working due to a failed window regulator. Replacement of the failed regulator will be necessary to correct this concern.

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Verified for the Mercedes-Benz 500SEL

The lenses for head lights may become opaque (cloudy or hazy) as a result of sun exposure. This can reduce the effectiveness of the lights. Our technicians tell us plastic polishes can improve the clarity of the lenses, but replacement of the lamp housings is necessary to regain full intensity of the lights.

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Verified for the Mercedes-Benz 500SEL
Glove box hinges, the center console armrest, and the cup holders break.
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Verified for the Mercedes-Benz 500SEL

Vehicles with automatic level control that ride harshly in the rear (no give in the suspension) may have one or both dampening actuators which have failed. It is commonly recommended the actuators be replaced in pairs.

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Verified for the Mercedes-Benz 500SEL

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.

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Verified for the Mercedes-Benz 500SEL
Oil feed tubes break and fall into the crankcase (engine) and the tappet becomes noisy (ticking), resulting in degraded idle quality. Our technicians recommend replacing all of the tubes at the same time, broken or not.
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Verified for the Mercedes-Benz 500SEL

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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