2003 Mercedes-Benz ML55 AMG

The 2003 Mercedes-Benz ML55 AMG is a performance SUV that was highly regarded for its powerful engine and luxurious features. The ML55 AMG came standard with a 5.4L V8 engine, producing 342 horsepower and 376 lb-ft of torque, paired with a 5-speed automatic transmission. Owners typically appreciate the ML55 AMG for its strong acceleration and comfortable ride. Common dislikes include its fuel economy and potential maintenance costs associated with a high-performance vehicle.

Engine

5.4L V8

• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various areas including valve cover gaskets, oil pan gasket, and rear main seal. Symptoms include visible oil leaks, burning oil smell, and low oil level.
  • Solution: Replace the leaking gaskets or seals.
  • Estimated Cost to Fix: $200 - $1,000+ depending on the location and severity of the leak.
  • Recalls: None Found
• Mass Air Flow Sensor (MAF) Failure
  • Description/Symptoms: The MAF sensor can fail, leading to poor engine performance, rough idling, and potential stalling.
  • Solution: Replace the MAF sensor.
  • Estimated Cost to Fix: $150 - $400
  • Recalls: None Found

Transmission

5-Speed Automatic

• Transmission Slipping
  • Description/Symptoms: Transmission slipping between gears, delayed engagement, or harsh shifting.
  • Solution: Could be due to low fluid, worn clutch packs, or valve body issues. In some cases, a transmission rebuild or replacement is needed.
  • Estimated Cost to Fix: $200 (fluid change) - $4,000+ (rebuild/replacement).
  • Recalls: None Found

Suspension

• Air Suspension Failure
  • Description/Symptoms: The air suspension system can develop leaks or compressor failure, leading to a sagging vehicle, uneven ride height, and error messages.
  • Solution: Replace leaking air struts, compressor, or related components.
  • Estimated Cost to Fix: $500 - $2,000+ per strut, $300 - $800+ for compressor.
  • Recalls: None Found

Electrical

• Instrument Cluster Issues
  • Description/Symptoms: Pixels missing or fading on the instrument cluster display, especially in warm weather.
  • Solution: Replacement or repair of the instrument cluster.
  • Estimated Cost to Fix: $300 - $1,000
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: The battery drains quickly, especially if the car is not driven frequently.
  • Solution: Diagnose the source of the drain (e.g., faulty module, aftermarket accessories) and repair or disconnect the faulty component.
  • Estimated Cost to Fix: $100 - $500+ depending on the issue.
  • Recalls: None Found

Exterior

• Rust
  • Description/Symptoms: Rust can occur in areas prone to moisture and road salt, such as wheel wells, rocker panels, and door bottoms.
  • Solution: Rust repair, bodywork, and paint.
  • Estimated Cost to Fix: $200 - $2,000+ depending on the severity.
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof may become stuck, noisy, or leak.
  • Solution: Lubricate tracks, replace damaged components, or realign the sunroof.
  • Estimated Cost to Fix: $100 - $800+
  • Recalls: None Found

Summary

The 2003 Mercedes-Benz ML55 AMG, while a powerful and luxurious SUV, is prone to certain common issues. Engine oil leaks and transmission problems are prevalent, and can be costly to repair. The air suspension system is another area to watch out for. Electrical issues such as instrument cluster failures can also arise. While rust isn’t uncommon for vehicles of this age, potential buyers should thoroughly inspect the vehicle for any signs of corrosion. Overall, potential owners should be aware of these potential issues and budget accordingly for maintenance and repairs.