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Mercedes-Benz CL500 Problems

Find the most common issues based on Mercedes-Benz CL500 owner complaints.
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Most Common Mercedes-Benz CL500 Problems

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 lo...
A door control module/actuator may fail. Our technicians recommend finding an expert to repair them. Taking the door trim panels off requires expert knowledge because they can break and the piece...
The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.
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2 Known Mercedes-Benz CL500 Brakes Problems

Due to the size and material used on the brakes of these vehicles, the brakes may start to squeak around the 50 percent wear point. The brake rotor surfaces become uneven, causing a lip to form at...
The anti-lock brake system (ABS) modulator assembly may fail due to dirty brake fluid. Our technicians recommend a complete brake system flush every two years in order to help prevent this problem.

6 Known Mercedes-Benz CL500 Drive Train Problems

A vibration felt through the center floor of the vehicle can be caused by cracked and/or shredded driveshaft flex discs, resulting in excessive driveshaft movement. If not repaired, damage to the...
Leaks may develop from the differential cover and/or seals on high mileage or older vehicles. Our technicians recommend a complete reseal of the differential unit if these leaks are addressed.
The electrical connector at the automatic transmission may leak fluid. Over time leaking fluid could migrate through the wiring harness and damage the transmission control module. If that happe...

6 Known Mercedes-Benz CL500 Electrical & Lights Problems

A door control module/actuator may fail. Our technicians recommend finding an expert to repair them. Taking the door trim panels off requires expert knowledge because they can break and the piece...
CD changers, command units, voice control units, PSE units, and Tele Aid units are prone to failure, especially in early models.
The ESP and BAS warning lights may illuminate due to a failed brake light switch. Replacement of the failed switch should correct this concern.

10 Known Mercedes-Benz CL500 Engine Problems

The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.
The rubber bond in the harmonic balancer can decay, which causes the balancer to move and work its way toward the timing cover. If the balancer comes into contact with the timing cover while the ...
An engine Oil leak may develop from the PCV vent housing on the valve cover and/or the inspection plate on the front of the engine.

3 Known Mercedes-Benz CL500 Exhaust & Emissions Problems

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

6 Known Mercedes-Benz CL500 Heating & Air Conditioning Problems

The evaporator temperature sensor can fail, causing the AC compressor not to cycle. If the AC compressor does not turn on, the AC system will not blow cold air. If the compressor is stuck on, the a...
Due to wear of mechanical parts in the control head, the buttons on temperature control assemblies work erratically or not at all. These control heads need to be replaced for this concern or when...
Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.

0 Known Mercedes-Benz CL500 Maintenance Problems

12 Known Mercedes-Benz CL500 Miscellaneous Problems

The side window glass can delaminate. If this were to occur, replacement of the affected window would be necessary.
The door for the vanity mirror (or the frame for the door) can break; due to a redesign, the mirror "cassette" will need replacement.
The center console armrest can break. Replacement is commonly the recommended repair.

8 Known Mercedes-Benz CL500 Suspension & Steering Problems

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 lo...
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.
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 repa...

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Known Mercedes-Benz CL500 Problems & Complaints

A door control module/actuator may fail. Our technicians recommend finding an expert to repair them. Taking the door trim panels off requires expert knowledge because they can break and the piece...
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 lo...
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 repa...
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 t...
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 s...
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 engi...
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.
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