2009 Mercedes-Benz CLK280

The 2009 Mercedes-Benz CLK280 is a luxury coupe/cabriolet that offers a blend of style and comfort. While the CLK280 comes with a 3.0L V6 engine producing around 231 horsepower and 221 lb-ft of torque, other engine options for the CLK range in this year included the CLK350, CLK500, and the high-performance CLK63 AMG. The 2009 CLK280 is generally praised for its elegant design and comfortable ride, but some common complaints include electrical issues and certain reliability concerns related to the engine.

Engine

3.0L V6 (M272)

• Balance Shaft Sprocket Wear
  • Description/Symptoms: The balance shaft sprocket can wear prematurely, leading to timing issues, rough running, and potentially engine damage. Symptoms include a check engine light with codes related to camshaft timing (e.g., P0016, P0017).
  • Solution: Replacement of the balance shaft, which often requires significant engine disassembly.
  • Estimated Cost to Fix: $2,500 - $4,000+
• Intake Manifold Flap Motor Failure (M272)
  • Description/Symptoms: The intake manifold flap motor can fail, causing poor engine performance, reduced fuel economy, and a check engine light.
  • Solution: Replacement of the intake manifold flap motor.
  • Estimated Cost to Fix: $500 - $1,000+

Transmission

7G-Tronic (722.9)

• Torque Converter Failure
  • Description/Symptoms: The torque converter can fail, leading to shuddering during acceleration or gear changes, slipping, and potentially complete loss of drive.
  • Solution: Replacement of the torque converter.
  • Estimated Cost to Fix: $1,500 - $3,000+
• Valve Body Issues
  • Description/Symptoms: Problems with the valve body can cause rough shifting, delayed engagement of gears, and transmission slippage.
  • Solution: Valve body replacement or rebuild.
  • Estimated Cost to Fix: $800 - $2,000+

Suspension

• Front Suspension Ball Joint Failure
  • Description/Symptoms: The front suspension ball joints can wear out prematurely, leading to excessive play in the front suspension, clunking noises, and poor handling.
  • Solution: Replacement of the affected ball joints.
  • Estimated Cost to Fix: $300 - $800+

Electrical

• EIS (Electronic Ignition Switch) Failure
  • Description/Symptoms: The EIS can fail, preventing the car from starting. This is a common Mercedes-Benz issue of this era.
  • Solution: Replacement or reprogramming of the EIS.
  • Estimated Cost to Fix: $800 - $1,500+
• SAM (Signal Acquisition Module) Failure
  • Description/Symptoms: The SAM controls various electrical functions, and failure can lead to issues with lights, wipers, and other accessories.
  • Solution: Replacement of the affected SAM unit.
  • Estimated Cost to Fix: $500 - $1,200+

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof malfunctions, including getting stuck open or closed, or making excessive noise.
  • Solution: Repair or replacement of sunroof motor, tracks, or cables.
  • Estimated Cost to Fix: $300 - $1,000+

Exterior

• Convertible Top Issues (Cabriolet Models Only)
  • Description/Symptoms: Problems with the convertible top mechanism, including hydraulic pump failures, sensor issues, and latching problems.
  • Solution: Diagnosis and repair/replacement of the faulty components.
  • Estimated Cost to Fix: $500 - $2,500+ depending on the severity of the issue.

Recalls None Found

Summary

The 2009 Mercedes-Benz CLK280 can be a stylish and comfortable car, but potential buyers should be aware of the common issues, particularly those related to the engine (balance shaft and intake manifold), transmission (torque converter and valve body), and electrical system (EIS and SAM). Repairs can be relatively costly, especially engine work, so a thorough inspection by a qualified mechanic before purchase is highly recommended. While the balance shaft issue is a well-known problem for the M272 engine, not all engines are affected. However, the potential for this failure is significant enough that it warrants careful consideration.