2010 Mercedes-Benz GL500

The 2010 Mercedes-Benz GL500, also known as the GL550 in some markets, is a full-size luxury SUV known for its spacious interior, comfortable ride, and powerful engine. While not officially named the GL500 in the North American market, this model is commonly referred to as such due to its engine designation. In North America, the closest equivalent is the GL550 which is equipped with a 5.5L V8 engine producing around 382 horsepower and 391 lb-ft of torque. Other engine options available for the GL-Class in 2010 include the GL350 BlueTEC (diesel V6) and the GL450 (4.6L V8). All models typically came with a 7-speed automatic transmission. Owners often praise the GL500/GL550 for its luxurious features, smooth ride, and ample cargo space. Common complaints include high maintenance costs, complicated electronics, and relatively poor fuel economy.

Engine

5.5L V8 (M273)

• Camshaft Adjuster Solenoid Failure
  • Description/Symptoms: Check engine light, rough idling, decreased fuel economy, and potential engine stalling. Diagnostic codes related to camshaft position may be present.
  • Solution: Replacement of the faulty camshaft adjuster solenoid(s).
  • Estimated Cost to Fix: $200 - $500+ per solenoid, depending on labor rates.
  • Recalls: None Found
• Intake Manifold Flap Motor Failure
  • Description/Symptoms: Check engine light, loss of power, especially at lower RPMs, and potential for increased fuel consumption. Diagnostic trouble codes (DTCs) related to the intake manifold runner control system.
  • Solution: Replacement of the intake manifold flap motor or the entire intake manifold assembly.
  • Estimated Cost to Fix: $500 - $1500+, depending on the extent of the repair and parts costs.
  • Recalls: None Found

Transmission

7-Speed Automatic (7G-Tronic - 722.9)

• Valve Body Issues
  • Description/Symptoms: Harsh or delayed shifting, slipping between gears, failure to shift into certain gears, or complete transmission failure. Can be intermittent.
  • Solution: Replacement of the valve body or, in some cases, a full transmission rebuild or replacement.
  • Estimated Cost to Fix: $800 - $4000+, depending on the severity and chosen repair method (valve body replacement vs. full rebuild).
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibration during acceleration, especially at lower speeds. Transmission slipping and potential for overheating.
  • Solution: Replacement of the torque converter. In some cases, transmission damage may necessitate a rebuild or replacement.
  • Estimated Cost to Fix: $1500 - $4000+, depending on the extent of damage.
  • Recalls: None Found

Suspension

• Airmatic Suspension Compressor Failure
  • Description/Symptoms: The vehicle sits lower than normal, especially after being parked overnight. The suspension may take a long time to raise. A warning light may illuminate on the dashboard.
  • Solution: Replacement of the Airmatic suspension compressor.
  • Estimated Cost to Fix: $800 - $1500+, including parts and labor.
  • Recalls: None Found
• Airmatic Strut Failure
  • Description/Symptoms: Leaking air from the strut, causing the vehicle to sag on one side or corner. Bouncy or unstable ride.
  • Solution: Replacement of the affected Airmatic strut(s). It’s often recommended to replace struts in pairs.
  • Estimated Cost to Fix: $1000 - $2500+ per strut, including labor.
  • Recalls: None Found

Electrical

• EIS (Electronic Ignition Switch) Failure
  • Description/Symptoms: Key not recognized, inability to start the vehicle, and steering lock malfunction.
  • Solution: Replacement of the EIS module, which requires programming to the vehicle.
  • Estimated Cost to Fix: $800 - $2000+, including parts and programming.
  • Recalls: None Found
• SAM (Signal Acquisition Module) Failure
  • Description/Symptoms: Various electrical malfunctions, such as lights not working, power windows not functioning, or issues with the wipers.
  • Solution: Replacement of the faulty SAM unit and reprogramming.
  • Estimated Cost to Fix: $600 - $1500+, depending on the specific SAM unit and programming requirements.
  • Recalls: None Found

Exterior

• Tail Light Assembly Issues
  • Description/Symptoms: Cracked tail light housings, bulb failure due to water ingress, or complete tail light failure.
  • Solution: Replacement of the tail light assembly.
  • Estimated Cost to Fix: $200-$500+ per assembly.
  • Recalls: None Found

Interior

• Navigation/COMAND System Problems
  • Description/Symptoms: Freezing, crashing, failure to load maps, or complete system failure.
  • Solution: Software update, replacement of the COMAND unit, or repair of the navigation system components.
  • Estimated Cost to Fix: $300 - $2000+, depending on the severity and repair method.
  • Recalls: None Found

Summary:

The 2010 Mercedes-Benz GL500/GL550 is prone to several issues, with the most significant concerns related to the air suspension, transmission, and electrical systems. Repairs can be costly, particularly for the air suspension and electrical components. While the engine itself is generally reliable, potential issues with the camshaft adjusters and intake manifold flaps can also lead to expensive repairs. Prospective buyers should be aware of these potential problems and budget accordingly for maintenance and repairs.