2001 Mercedes-Benz S55 AMG

The 2001 Mercedes-Benz S55 AMG is a high-performance luxury sedan that boasts impressive power and features for its time. The S-Class W220 generation, in general, is known for its comfortable ride, advanced technology (for the era), and luxurious appointments. The S55 AMG specifically is known for its increased performance over the base models. Some common complaints include the car’s complex electronics which can lead to reliability issues, and the high cost of maintenance and repairs. The S55 AMG is powered by a 5.4L Supercharged V8 engine, producing 355 hp and 391 lb-ft of torque. This engine was paired with a 5-speed automatic transmission. Other engine options for the 2001 S-Class included various V6 and V8 engines in the S430 and S500 models.

Engine

5.4L Supercharged V8 (M113K)

• Intercooler Pump Failure
  • Description/Symptoms: The intercooler pump circulates coolant through the intercooler to cool the intake air charge. Failure of the pump results in reduced engine performance, especially in hot weather. Loss of power, sluggish acceleration, and potential overheating.
  • Solution: Replace the intercooler pump.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Crankshaft Position Sensor Failure
  • Description/Symptoms: The crankshaft position sensor provides data to the ECU to control the ignition timing. Symptoms include stalling, difficulty starting, and a check engine light.
  • Solution: Replace the crankshaft position sensor.
  • Estimated Cost to Fix: $150 - $350+
  • Recalls: None Found
• Valve Cover Gasket Leaks
  • Description/Symptoms: Oil leaks from the valve cover gaskets. This can lead to oil burning smell and low oil level.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $300 - $700+
  • Recalls: None Found

Transmission

5-Speed Automatic (722.6)

• Conductor Plate Failure
  • Description/Symptoms: Erratic shifting, getting stuck in gear, failure to shift, or transmission going into “limp mode”.
  • Solution: Replace the conductor plate inside the transmission.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Valve Body Issues
  • Description/Symptoms: Harsh or delayed shifting, slipping between gears.
  • Solution: Valve body rebuild or replacement.
  • Estimated Cost to Fix: $800 - $2000+
  • Recalls: None Found

Suspension

• Airmatic Suspension Failure
  • Description/Symptoms: The Airmatic suspension uses air struts instead of conventional springs. These can leak, causing the car to sag, ride poorly, or fail to maintain the correct ride height. The Airmatic compressor can also fail.
  • Solution: Replace leaking air struts, repair or replace the Airmatic compressor.
  • Estimated Cost to Fix: $800 - $2000+ per strut; $500 - $1200+ for the compressor.
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: The car’s battery drains quickly, especially if the car is left unused for a few days. This can be caused by a parasitic draw from a faulty component.
  • Solution: Diagnose and repair the source of the parasitic draw. This may involve testing various electrical components to identify the faulty one.
  • Estimated Cost to Fix: $100 - $500+ (Diagnostic); Repair costs vary depending on the source of the draw.
  • Recalls: None Found
• Instrument Cluster Pixels Missing/Fading
  • Description/Symptoms: Pixels in the instrument cluster LCD screen fade or disappear, making it difficult to read the display.
  • Solution: Replace or repair the instrument cluster. Some services specialize in repairing the LCD screen.
  • Estimated Cost to Fix: $300 - $1000+
  • Recalls: None Found

Exterior

• Rust
  • Description/Symptoms: Rust can be found on the door panels, wheel arches, and undercarriage.
  • Solution: Cut out the rust and weld in new panels, or use a rust converter, body filler, and paint.
  • Estimated Cost to Fix: $100-$10,000+ depending on the severity of the rust.
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: The sunroof may not open or close properly, or it may make excessive noise.
  • Solution: Diagnose and repair the sunroof mechanism. This may involve replacing worn or broken parts.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Summary:

The 2001 Mercedes-Benz S55 AMG offers a blend of performance and luxury, but potential buyers should be aware of the common issues. The Airmatic suspension and electrical problems can be expensive to repair. Transmission and engine issues can also be costly, especially if not addressed promptly. Overall, owning a W220 S55 AMG requires diligent maintenance and a willingness to address potential problems as they arise. The severity and cost of repairs can vary widely, so a thorough pre-purchase inspection is highly recommended.