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2003 Mercedes-Benz CLK320 Problems

Find the most common issues based on 2003 Mercedes-Benz CLK320 owner complaints.
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Most Common 2003 Mercedes-Benz CLK320 Problems

The crankshaft position sensor may fail. Symptoms of this are: The engine will crank—but not start—especially when the engine is warm. The car may start again if it is left to cool ...
The instrument cluster display may lose pixels and need replacement. However, if the back lighting bulbs for the odometer display in the center of the cluster burn out, they can be replaced.
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.
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2 Known 2003 Mercedes-Benz CLK320 Brakes Problems

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.
As a way to increase braking performance, the brake pads and rotors are make of a softer material and may be in need of replacement after approximately 20,000 miles; owners should be vigilant abou...

4 Known 2003 Mercedes-Benz CLK320 Drive Train Problems

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...
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.

3 Known 2003 Mercedes-Benz CLK320 Electrical & Lights Problems

The instrument cluster display may lose pixels and need replacement. However, if the back lighting bulbs for the odometer display in the center of the cluster burn out, they can be replaced.
Computer control modules for the seats and doors, the CD changer, and the brake lamp switch tend to fail.
The CD changer may suffer from an internal mechanical problem. Replacement of the faulty unit is generally required to correct this issue.

4 Known 2003 Mercedes-Benz CLK320 Engine Problems

The crankshaft position sensor may fail. Symptoms of this are: The engine will crank—but not start—especially when the engine is warm. The car may start again if it is left to cool ...
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.
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 ...

2 Known 2003 Mercedes-Benz CLK320 Exhaust & Emissions Problems

Failed spark plug wires and/or ignition coils can cause intermittent misfires (rough running); the Check Engine Light may also illuminate. Diagnoses of the ignition system will be necessary to dete...
The mass air flow sensor can fail, resulting in poor fuel economy and Check Engine Light illumination.

3 Known 2003 Mercedes-Benz CLK320 Heating & Air Conditioning Problems

A repetitive clicking noise from behind the center area of the dash panel is usually caused by a broken stepper motor actuating arm. The actuating arm controls the direction of air flow in the clim...
The heating, ventilation and AC (HVAC) heater box is susceptible to mildew buildup. This can result in a musty odor from the HVAC system, most noticeable when the system is first turned on.
The heater case for the center vents can crack near the stop sensors. If the stops break, the control motor will not know when to stop and will run continuously.

0 Known 2003 Mercedes-Benz CLK320 Maintenance Problems

3 Known 2003 Mercedes-Benz CLK320 Miscellaneous Problems

Cup holders in the dash are known to break requiring repair or replacement.
Cables in the convertible top tend to break. If the convertible top stops operating prior to reaching the desired open or closed position, the micro switches that sense the position of the top may ...
Going over large bumps in convertible models may cause the roll bar to deploy, rendering the roof inoperative. Special tools are generally required to return the roll bar to its stowed position.

4 Known 2003 Mercedes-Benz CLK320 Suspension & Steering Problems

Torque thrust bushings in the front suspension may crack and leak oil, this causes steering alignment problems and excessive tire wear. Another symptom of a worn bushing is a clunk or thud noted ...
Ball joints can wear out prematurely, causing wear in the tires.
The sway bar end link joints may wear and cause a knocking noise over bumps. Loose or warn links should be replaced to correct this type of noise.

25
Known 2003 Mercedes-Benz CLK320 Problems & Complaints

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...
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.
The mass air flow sensor can fail, resulting in poor fuel economy and Check Engine Light illumination.
Torque thrust bushings in the front suspension may crack and leak oil, this causes steering alignment problems and excessive tire wear. Another symptom of a worn bushing is a clunk or thud noted ...
Cables in the convertible top tend to break. If the convertible top stops operating prior to reaching the desired open or closed position, the micro switches that sense the position of the top may ...
The instrument cluster display may lose pixels and need replacement. However, if the back lighting bulbs for the odometer display in the center of the cluster burn out, they can be replaced.
Ball joints can wear out prematurely, causing wear in the tires.
Computer control modules for the seats and doors, the CD changer, and the brake lamp switch tend to fail.
Going over large bumps in convertible models may cause the roll bar to deploy, rendering the roof inoperative. Special tools are generally required to return the roll bar to its stowed position.
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