2005 Mercedes-Benz CLK500

The 2005 Mercedes-Benz CLK500 is a luxury coupe/convertible that offers a blend of style, performance, and comfort. Powered by a 5.0L V8 engine producing 302 horsepower and 339 lb-ft of torque, it provides ample power for daily driving and spirited cruising. Other engine options included the CLK320 with a 3.2L V6 and the CLK55 AMG with a 5.4L V8. All CLK models are rear-wheel drive and came equipped with a 5-speed automatic transmission. Owners often praise the CLK500 for its smooth ride, elegant interior, and powerful engine. Common complaints include electrical issues, the cost of maintenance, and some reliability concerns.

Engine

5.0L V8 (M113)

• Oil Leaks
  • Description/Symptoms: Oil leaks are a common issue in the M113 engine, often stemming from the valve cover gaskets, oil filter housing gasket, or rear main seal. Symptoms include visible oil leaks, a burning oil smell, and low oil levels.
  • Solution: Replacing the leaking gasket or seal is the typical solution.
  • Estimated Cost to Fix: $200 - $800+ depending on the location and complexity.
• Mass Air Flow (MAF) Sensor Failure
  • Description/Symptoms: The MAF sensor can fail, leading to poor engine performance, rough idling, and a check engine light.
  • Solution: Replacement of the MAF sensor.
  • Estimated Cost to Fix: $200 - $400
• Crankshaft Position Sensor Failure
  • Description/Symptoms: Engine stalls, no start condition.
  • Solution: Replacement of the crankshaft position sensor.
  • Estimated Cost to Fix: $150 - $300

Transmission

5-Speed Automatic (722.6)

• Transmission Conductor Plate Failure
  • Description/Symptoms: Erratic shifting, getting stuck in gear, or a complete loss of drive. The conductor plate, located inside the transmission, houses the electronic sensors and valve body controls.
  • Solution: Replacement of the conductor plate, often along with a transmission fluid and filter change.
  • Estimated Cost to Fix: $800 - $1500+
• Valve Body Issues
  • Description/Symptoms: Harsh shifting, slipping between gears, or delayed engagement. The valve body controls the flow of transmission fluid to different clutches and bands.
  • Solution: Replacement or rebuild of the valve body.
  • Estimated Cost to Fix: $800 - $2000+

Suspension

• Control Arm Bushing Failure
  • Description/Symptoms: Clunking noises from the front suspension, particularly when going over bumps. The control arm bushings wear out over time, causing play in the suspension.
  • Solution: Replacement of the control arm bushings or the entire control arm.
  • Estimated Cost to Fix: $300 - $800+ per side.
• Ball Joint Failure
  • Description/Symptoms: Squeaking or creaking noises from the suspension, loose steering, and uneven tire wear.
  • Solution: Replacement of the ball joints, often requiring replacement of the entire control arm.
  • Estimated Cost to Fix: $300 - $800+ per side.

Electrical

• EIS (Electronic Ignition Switch) Failure
  • Description/Symptoms: Difficulty starting the car, the key not being recognized, or the car not turning on at all. The EIS is a common point of failure in these Mercedes models.
  • Solution: Replacement of the EIS, which typically requires programming by a Mercedes-Benz dealer or a qualified specialist.
  • Estimated Cost to Fix: $800 - $1500+
• SAM (Signal Acquisition Module) Issues
  • Description/Symptoms: Malfunctions in various electrical systems, such as lights, wipers, or power windows. The SAM controls various electrical functions.
  • Solution: Diagnosis to identify the faulty SAM and replacement or reprogramming as needed.
  • Estimated Cost to Fix: $500 - $1200+
• Instrument Cluster Pixel Loss
  • Description/Symptoms: Pixels disappearing or fading on the instrument cluster display, making it difficult to read information.
  • Solution: Repair or replacement of the instrument cluster.
  • Estimated Cost to Fix: $300 - $800+
• Door Lock Actuator Failure
  • Description/Symptoms: Doors not locking or unlocking properly with the remote or interior switch.
  • Solution: Replacement of the faulty door lock actuator.
  • Estimated Cost to Fix: $200 - $500+ per door.

Exterior

• Rust
  • Description/Symptoms: Rust forming along body panels, especially around the wheel wells, door seams, and trunk lid.
  • Solution: Rust repair, which can range from minor spot repairs to more extensive panel replacement.
  • Estimated Cost to Fix: $200 - $2000+ depending on the severity.
• Convertible Top Issues (Convertible Models Only)
  • Description/Symptoms: Hydraulic pump failure, leaks in the hydraulic system, or issues with the top not opening or closing properly.
  • Solution: Repair or replacement of the hydraulic pump, lines, or cylinders.
  • Estimated Cost to Fix: $500 - $2000+

Interior

• Center Console Cup Holder Failure
  • Description/Symptoms: The cup holder mechanism breaks, making it difficult or impossible to use.
  • Solution: Replacement of the cup holder assembly.
  • Estimated Cost to Fix: $100 - $300+
• Sunroof Issues
  • Description/Symptoms: Sunroof motor failure or glass not aligned.
  • Solution: Replacement or repair of the sunroof motor.
  • Estimated Cost to Fix: $200 - $500+

Recalls

• 2006070001, 2006080004, 2006090003, 2007030001, 2014070003

Summary

The 2005 Mercedes-Benz CLK500 is a desirable car, but prospective buyers should be aware of the potential issues. Electrical problems, particularly with the EIS and SAM, are common and can be expensive to fix. Oil leaks and transmission issues are also known problems. Suspension components can wear out over time, leading to repair costs. Rust can also be a concern, depending on the vehicle’s location and maintenance history. While the CLK500 offers a luxurious driving experience, the potential for costly repairs should be considered.