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Mercedes-Benz CL500 Problems

RepairPal has identified the most common problems with the Mercedes-Benz CL500 based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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Known Problems

Bad spark plug wires can cause misfires; the Check Engine Light may illuminate.

Front thrust arm and control arm bushings can crack and sometimes tear completely. If this is not repaired quickly, damage to the front subframe unit will occur, which is very expensive to repair. Updated control arms (that prevent damage to the subframe when the bushings wear out) are available.

Instrument cluster lenses break easily.

Glove box hinges, the center console armrest, and the cup holders break.

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

A cracked or broken heater core outlet housing can cause a coolant leak near the bulkhead (firewall). Our technicians remind us that coolant leaks should be repaired in order to avoid overheating the engine due to coolant loss.

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.

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.

The active body control system can leak fluid from numerous areas, including the tandem pump, hydraulic lines, struts, and/or seals. If it is not repaired, the vehicle ride height could drop too low and cause damage to the undercarriage.

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

The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.

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.

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

Cup holders break easily, especially if sticky liquids are spilled into the cup holder mechanism.

The mass air flow (MAF) sensor tends to fail. The engine air filter should be replaced when the mass air flow sensor is replaced; a dirty filter can allow debris to damage the new sensor.