AI Damage2003 Mercedes-Benz CLK Class: common problems
Owners of the 2003 Mercedes-Benz CLK Class filed 10 complaints with NHTSA, most often about tires and electrical system. Details by component below, with sources.
Key figures
- Owner complaints
- 10
- involving a crash
- 1
What fails most often
- 1 Tires 20% of all complaints
- 2 Electrical system 10% of all complaints
- 3 Equipment 10% of all complaints
- 4 Exterior lighting 10% of all complaints
- 5 Powertrain 10% of all complaints
- 6 Seat belts 10% of all complaints
- 7 Steering 10% of all complaints
- 8 Structure 10% of all complaints
- Tires: 2 complaints (20% of all).
- Electrical system: 1 complaints (10% of all).
- Equipment: 1 complaints (10% of all).
- Exterior lighting: 1 complaints (10% of all).
- Powertrain: 1 complaints (10% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3.2 L · petrol · 6 cyl
- 4.3 L · petrol · 8 cyl
- 5 L · petrol · 8 cyl
- 5.4 L · petrol · turbo · 8 cyl
- automatic, 5-speed
Drive: RWD
Symptoms owners describe
How many of the 10 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Tires | 2 | 0 | 0 |
| Electrical system | 1 | 0 | 0 |
| Equipment | 1 | 0 | 0 |
| Exterior lighting | 1 | 0 | 0 |
| Powertrain | 1 | 0 | 0 |
| Seat belts | 1 | 0 | 0 |
| Steering | 1 | 0 | 0 |
| Structure | 1 | 0 | 0 |
| Vehicle speed control | 1 | 1 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
While making a left turn to pull into the garage, the vehicle suddenly accelerated at a high speed. The consumer's foot was on the brake pedal when this occurred. The consumer applied excessive force to the brake pedal to stop the vehicle from accelerating, but it failed to do so.
I have had seat belt trouble. When I first bought the car it was weak to retract. Than 9 months later it gave out on me. I looked into it online and it turns out almost all these vehicles have this problem before 100,000 miles.
The contact stated that the speedometer and radio were defective. He mentioned that the pixels on both were missing. The dealer was contacted who stated that the instrument cluster would need to be replaced. The manufacturer was not made aware of the problem and the vehicle was not repaired.
While driving approximately 10 mph, the contact noticed flames underneath the vehicle. The vehicle was completely destroyed and two other vehicles were moderately damaged by the flames. He noticed excessive power steering fluid on the ground where the vehicle was located.
Transmission failure. Rusted and corroded trans at 24,000 miles caused by faulty mercedes valeo radiator. Mercedes own star bulletin tells dealers about this issue but my dealer decided not to check it out and now mercedes and dealer are refusing to help when this is a known problem on many of their models and should…
Tl contact owns a 2003 mercedes benz clk 430. The contact noticed that the brackets that hold the front bumper were failing. The failure caused the turn signal lights to detach from the bumper. The dealer did not state the cause of the failure. The current mileage is 34,000 and failure mileage was 29,000.
Tl*- the contact stated that the 2003 mercedes clk 500, had a blowout on the rear passenger tire. This happened on a cold clear day while driving at 65 mph. He tire dealership informed her that there was nail in the tire, but not in the section of the blowout. The tire was a bridgestone potenza.
While driving 60 mph front driver side tire blew out. No impact reported. Then, six months later the same tire blew out again.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 10,921 of 36,659 model years in the NHTSA data (top 30% most complained about).
On average one model year of the CLK Class has 7 complaints (5 years in the data). This year has 10, above average.
What to check before buying
- Tires. Tire age by DOT code, bulges, wear pattern.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Exterior lighting. Headlamps, leveling, sensors and mounts after a frontal hit.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Other years of this model
Questions and answers
What are the most common problems with the 2003 Mercedes-Benz CLK Class?
Owner complaints to NHTSA most often mention: tires, electrical system, equipment. Total complaints: 10. The most frequent symptoms in complaint texts: rust, corrosion (10%), infotainment or screen glitches (10%), seat belts (10%).
How many service bulletins (TSB) were issued for the 2003 Mercedes-Benz CLK Class?
NHTSA lists 0 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2003 Mercedes-Benz CLK Class from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2003 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-06.