2010 Mercedes-Benz ML500

The 2010 Mercedes-Benz ML500 is a luxurious and capable SUV known for its comfortable ride and powerful engine. The ML500 specifically comes with a 5.5L V8 engine producing 382 horsepower and 391 lb-ft of torque. The other engine options for the 2010 M-Class include a 3.5L V6 in the ML350 and a diesel 3.0L V6 in the ML350 BlueTEC. All engine options are paired with a 7-speed automatic transmission. People generally appreciate the ML500 for its smooth ride, powerful engine, and luxurious features. Common complaints revolve around higher maintenance costs compared to other SUVs, and occasional electronic issues.

Engine

5.5L V8 (M273)

• Camshaft Adjuster Solenoid Failure
  • Description/Symptoms: Engine may experience rough idling, misfires, and a check engine light. Diagnostic trouble codes (DTCs) related to camshaft position may be present.
  • Solution: Replace the faulty camshaft adjuster solenoid(s).
  • Estimated Cost to Fix: $200 - $500+ (depending on location and labor rates)
  • Recalls: None Found
• Valve Cover Gasket Leak
  • Description/Symptoms: Oil leaks around the valve cover, potentially causing a burning smell as oil drips onto hot engine components.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $300 - $700+
  • Recalls: None Found
• Oil Filter Housing Gasket Leak
  • Description/Symptoms: Oil leaks around the oil filter housing, potentially causing a burning smell as oil drips onto hot engine components.
  • Solution: Replace the oil filter housing gasket.
  • Estimated Cost to Fix: $400 - $800+
  • Recalls: None Found

Transmission

7G-Tronic (722.9)

• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibrations during acceleration, especially at lower speeds. The transmission may also exhibit harsh shifting or slipping.
  • Solution: Replace the torque converter.
  • Estimated Cost to Fix: $1500 - $3500+
  • Recalls: None Found
• Valve Body Issues
  • Description/Symptoms: Erratic shifting, harsh shifting, delayed engagement, or failure to shift into certain gears.
  • Solution: Replace or rebuild the valve body.
  • Estimated Cost to Fix: $800 - $2000+
  • Recalls: None Found
• Conductor Plate Failure
  • Description/Symptoms: Transmission stuck in limp mode, inability to shift, or incorrect gear display on the instrument cluster.
  • Solution: Replace the conductor plate.
  • Estimated Cost to Fix: $700 - $1500+
  • Recalls: None Found

Suspension

• Airmatic Suspension Issues
  • Description/Symptoms: Vehicle sagging or uneven ride height, compressor failure, air leaks from struts or lines, and “Visit Workshop” message on the instrument cluster.
  • Solution: Replace faulty air struts, compressor, or repair air leaks.
  • Estimated Cost to Fix: $800 - $2000+ per strut, $500 - $1500+ for compressor replacement.
  • Recalls: None Found
• Ball Joint Failure
  • Description/Symptoms: Clunking noise coming from the front suspension, loose steering, and uneven tire wear.
  • Solution: Replace the worn ball joints.
  • Estimated Cost to Fix: $300 - $800+ per side.
  • Recalls: None Found

Electrical

• EIS (Electronic Ignition Switch) Failure
  • Description/Symptoms: Key not recognized, inability to start the vehicle, and steering wheel lock malfunction.
  • Solution: Replace the EIS and potentially reprogram it to the vehicle.
  • Estimated Cost to Fix: $800 - $2000+
  • Recalls: None Found
• SAM (Signal Acquisition Module) Failure
  • Description/Symptoms: Malfunctioning lights, wipers, or other electrical components. Error messages on the instrument cluster.
  • Solution: Replace the faulty SAM unit and reprogram it.
  • Estimated Cost to Fix: $600 - $1500+
  • Recalls: None Found
• Alternator Failure
  • Description/Symptoms: Battery warning light, dimming headlights, and difficulty starting the engine.
  • Solution: Replace the alternator.
  • Estimated Cost to Fix: $400 - $1000+
  • Recalls: None Found

Exterior

• Rear Hatch Strut Failure
  • Description/Symptoms: Rear hatch will not stay open on its own or closes unexpectedly.
  • Solution: Replace the rear hatch struts.
  • Estimated Cost to Fix: $100 - $300+
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof fails to open or close properly, makes excessive noise during operation, or leaks water.
  • Solution: Repair or replace the sunroof motor, tracks, or seals.
  • Estimated Cost to Fix: $300 - $1000+
  • Recalls: None Found
• Navigation/Infotainment System Failure
  • Description/Symptoms: System freezes, reboots unexpectedly, or displays error messages.
  • Solution: Update the software, or replace the head unit.
  • Estimated Cost to Fix: $200 - $1500+
  • Recalls: None Found

Summary

The 2010 Mercedes-Benz ML500, while a luxurious and powerful SUV, is susceptible to several common issues. Engine oil leaks and suspension problems are recurring themes. Electrical issues, particularly with the EIS and SAM units, can also be costly. The transmission may experience problems with the torque converter, valve body, or conductor plate. Overall, owners should be prepared for potentially higher maintenance costs associated with these repairs. The severity of the issues can range from minor inconveniences to major mechanical failures, with repair costs varying widely.