2007 Mercedes-Benz CLK63 AMG

The 2007 Mercedes-Benz CLK63 AMG is a high-performance coupe and cabriolet known for its powerful engine and luxurious features. The primary engine option is the 6.2L M156 V8 engine, producing 475 horsepower and 465 lb-ft of torque. While admired for its aggressive styling, robust engine, and comfortable interior, owners have reported issues related to engine maintenance, electrical systems, and other components. Common complaints include higher maintenance costs compared to standard models, potential for costly repairs, and specific issues related to the AMG-tuned components.

Engine

6.2L M156 V8

• Camshaft Adjuster Bolts Failure
  • Description/Symptoms: The original camshaft adjuster bolts (also known as camshaft sprocket bolts) are prone to failure. Symptoms include a ticking noise from the engine, especially at cold start, and potentially catastrophic engine damage if the bolts shear off and enter the engine.
  • Solution: Replace the original camshaft adjuster bolts with the updated, stronger bolts. This is considered a preventative maintenance item.
  • Estimated Cost to Fix: $1,500 - $3,000+ (depending on the shop and any consequential damage)
  • Recalls: None Found
• Intake Manifold Gasket Failure
  • Description/Symptoms: Cracking, hissing noise, rough idle, misfires, and/or loss of power.
  • Solution: Replace the intake manifold gaskets.
  • Estimated Cost to Fix: $400-$800
  • Recalls: None Found
• Head Bolt Failure
  • Description/Symptoms: The 6.2L M156 V8 Engine is known to be susceptible to head bolt failure, typically in the earlier production years. Symptoms include coolant consumption, overheating, and milky residue in the oil.
  • Solution: Replace the head bolts with updated, stronger head bolts. This is an extensive repair.
  • Estimated Cost to Fix: $4,000 - $8,000+ (due to the complexity and labor involved)
  • Recalls: None Found
• Lifter Tick
  • Description/Symptoms: Ticking noise from the top of the engine, often more noticeable at idle.
  • Solution: Replacement of the affected lifters is the typical solution, which may involve removing the cylinder heads.
  • Estimated Cost to Fix: $2,000 - $4,000+
  • Recalls: None Found

Transmission

7G-Tronic (722.9)

• Valve Body Issues
  • Description/Symptoms: Harsh shifting, delayed engagement, slipping between gears, getting stuck in gear, or failure to shift properly.
  • Solution: Replace or rebuild the valve body. Sometimes, simply replacing the conductor plate and solenoids within the valve body can resolve the issue.
  • Estimated Cost to Fix: $1,500 - $3,500+ (depending on the extent of the repair and whether a new or rebuilt valve body is used)
  • Recalls: None Found

Suspension

• Air Suspension Problems (if equipped)
  • Description/Symptoms: The Airmatic suspension (if equipped) can experience leaks in the air struts, compressor failure, or issues with the valve block. Symptoms include the car sitting unevenly, the suspension not adjusting properly, or a warning light on the dashboard.
  • Solution: Replace the leaking air struts, compressor, or valve block as needed.
  • Estimated Cost to Fix: Air struts: $800 - $1,500+ per strut. Compressor: $500 - $1,000+. Valve block: $300 - $600+.
  • Recalls: None Found
• Front Lower Control Arm Bushings
  • Description/Symptoms: Clunking noise from the front suspension, especially over bumps. Vague steering or uneven tire wear.
  • Solution: Replace the front lower control arm bushings.
  • Estimated Cost to Fix: $400 - $800
  • Recalls: None Found

Electrical

• Electronic Ignition Switch (EIS) Failure
  • Description/Symptoms: Intermittent starting problems, key not recognized, or complete failure to start.
  • Solution: Replace the EIS. This may require programming by a Mercedes-Benz dealer or specialist.
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found
• Rear SAM (Signal Acquisition Module) Issues
  • Description/Symptoms: Malfunctions of rear lights, trunk not opening, or other electrical issues in the rear of the vehicle.
  • Solution: Replace or reprogram the rear SAM.
  • Estimated Cost to Fix: $500 - $1,200+
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• No Issues Found

Summary

The 2007 Mercedes-Benz CLK63 AMG offers exhilarating performance but requires careful attention to potential issues. The most significant concerns revolve around the M156 engine, particularly camshaft adjuster bolt failure and potential head bolt issues. The 7G-Tronic transmission can also experience valve body problems. Suspension and electrical issues can arise as well. Overall, maintenance costs can be high, and potential repairs can be expensive, making pre-purchase inspections and preventative maintenance crucial.