2007 Mercedes-Benz C55 AMG

The 2007 Mercedes-Benz C55 AMG is a performance-oriented sedan featuring a hand-built 5.4L naturally aspirated V8 engine producing 362 horsepower and 376 lb-ft of torque. It was only offered with a 5-speed automatic transmission. Owners often praise its powerful engine, comfortable ride, and understated styling, while some common complaints include higher maintenance costs and fuel consumption compared to standard C-Class models.

Engine

5.4L M113 V8

• Camshaft Position Sensor Failure
  • Description/Symptoms: The engine may experience rough idling, stalling, or a loss of power. The check engine light may illuminate with codes related to the camshaft position sensor.
  • Solution: Replacing the faulty camshaft position sensor.
  • Estimated Cost to Fix: $100 - $300+
  • Recalls: None Found
• Valve Cover Gasket Leaks
  • Description/Symptoms: Oil leaks may be visible around the valve covers, potentially causing a burning smell as oil drips onto hot engine components. Low oil level can also occur.
  • Solution: Replacing the valve cover gaskets.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Crankshaft Position Sensor Failure
  • Description/Symptoms: Engine may fail to start or stall while driving.
  • Solution: Replace the Crankshaft position sensor.
  • Estimated Cost to Fix: $150 - $350+
  • Recalls: None Found

Transmission

5-Speed Automatic (722.6)

• Torque Converter Failure
  • Description/Symptoms: Shuddering during acceleration, slipping between gears, or complete transmission failure.
  • Solution: Replacing the torque converter or rebuilding the transmission.
  • Estimated Cost to Fix: $800 - $3000+
  • Recalls: None Found
• Conductor Plate Failure
  • Description/Symptoms: Erratic shifting, limp mode, or failure to shift at all. Diagnostic codes related to the transmission control module (TCM) or solenoids may be present.
  • Solution: Replacing the conductor plate within the transmission. This often involves replacing the transmission fluid and filter as well.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Suspension

• Air Suspension Component Failure (if equipped with optional Airmatic)
  • Description/Symptoms: Vehicle sagging on one or more corners, compressor running constantly, or “Visit Workshop” message related to air suspension. This can be due to leaks in the air struts or failure of the air compressor.
  • Solution: Replacing the faulty air strut(s) or air compressor.
  • Estimated Cost to Fix: $800 - $2000+ per strut; $500 - $1500+ for compressor
  • Recalls: None Found
• Control Arm Bushing Failure
  • Description/Symptoms: Clunking noises from the front or rear suspension, especially over bumps. Poor handling and alignment issues can also occur.
  • Solution: Replacing the worn control arm bushings or the entire control arm assembly.
  • Estimated Cost to Fix: $300 - $800+ per control arm
  • Recalls: None Found

Electrical

• EIS (Electronic Ignition Switch) Failure
  • Description/Symptoms: Intermittent starting problems, inability to turn the key, or complete failure to start the vehicle.
  • Solution: Replacing the EIS module.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• SAM (Signal Acquisition Module) Failure
  • Description/Symptoms: Various electrical malfunctions, such as malfunctioning lights, wipers, or other accessories. Diagnostic codes related to the SAM may be present.
  • Solution: Replacing the faulty SAM.
  • Estimated Cost to Fix: $500 - $1200+
  • Recalls: None Found
• Instrument Cluster Pixelation
  • Description/Symptoms: Pixels in the instrument cluster display fade or disappear, making it difficult to read information.
  • Solution: Repairing or replacing the instrument cluster.
  • Estimated Cost to Fix: $300 - $1000+
  • Recalls: None Found

Exterior

• Rust Issues
  • Description/Symptoms: Rust developing on body panels, especially around wheel wells, door edges, and underbody.
  • Solution: Repairing or replacing rusted panels, addressing the underlying cause of the rust.
  • Estimated Cost to Fix: $300 - $2000+ depending on the severity.
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof may be stuck, difficult to open or close, or leaking.
  • Solution: Repairing or replacing the sunroof motor, tracks, or seals.
  • Estimated Cost to Fix: $300 - $1000+
  • Recalls: None Found

Summary

The 2007 Mercedes-Benz C55 AMG can be a rewarding vehicle to own, but potential buyers should be aware of the common issues and higher maintenance costs. The most significant concerns often revolve around the engine and transmission, with potential failures of the torque converter, conductor plate, camshaft position sensor, and valve cover gaskets. Electrical issues such as EIS or SAM module failures can also be costly to repair. Suspension problems with the Airmatic system can also be expensive if equipped. While some repairs can be relatively inexpensive, others can quickly add up to significant amounts.