2007 Mercedes-Benz MBO 14000

The 2007 Mercedes-Benz GL450 (X164 chassis) is a full-size luxury SUV that seats seven. Available engine options included a 4.6L V8 engine (M273) producing 335 horsepower and 339 lb-ft of torque. All GL450 models were equipped with a 7G-TRONIC 7-speed automatic transmission. Owners often praise the GL450 for its luxurious interior, comfortable ride, and spaciousness. Common complaints include higher than average maintenance costs, occasional electrical issues, and fuel economy.

Engine

4.6L V8 (M273)

• Balance Shaft Sprocket Failure
  • Description/Symptoms: A common issue affecting the M273 engine, particularly in earlier production years. The teeth on the balance shaft sprocket wear prematurely. Symptoms include a check engine light with codes related to camshaft timing, rough idling, and potential engine noise.
  • Solution: Replacement of the balance shaft sprocket and potentially the balance shaft itself.
  • Estimated Cost to Fix: $2,500 - $5,000+ depending on the shop and the extent of damage.
  • Recalls: None Found
• Intake Manifold Flap Motor Failure
  • Description/Symptoms: The intake manifold uses flaps to optimize airflow at different engine speeds. The flap motor can fail, leading to a check engine light with codes related to intake manifold runner control.
  • Solution: Replacement of the intake manifold flap motor or the entire intake manifold assembly.
  • Estimated Cost to Fix: $500 - $1,500
  • Recalls: None Found
• Camshaft Adjuster Solenoid (Cam Magnet) Leaks
  • Description/Symptoms: Oil leaks from the camshaft adjuster solenoids (also known as cam magnets) are common. Oil can wick into the engine wiring harness, potentially causing further electrical problems.
  • Solution: Replacement of the leaking camshaft adjuster solenoids and cleaning of the wiring harness.
  • Estimated Cost to Fix: $200 - $500 per solenoid, plus additional costs for wiring harness cleaning.
  • Recalls: None Found

Transmission

7G-TRONIC 7-Speed Automatic (722.9)

• Conductor Plate Failure
  • Description/Symptoms: The 722.9 transmission is known for conductor plate failures, which can lead to shifting problems, erratic gear changes, and the transmission going into limp mode.
  • Solution: Replacement of the conductor plate inside the transmission.
  • Estimated Cost to Fix: $800 - $1,500
  • Recalls: None Found
• Valve Body Issues
  • Description/Symptoms: The valve body can experience wear and tear, leading to harsh shifting, slipping, and delayed engagement of gears.
  • Solution: Replacement or rebuilding of the valve body.
  • Estimated Cost to Fix: $1,000 - $2,500
  • Recalls: None Found

Suspension

• Air Suspension Failure (Airmatic)
  • Description/Symptoms: The GL450 is equipped with an Airmatic air suspension system. Common issues include leaking air struts, a failing air compressor, or problems with the valve block. Symptoms include the vehicle sitting lower than normal, uneven ride height, and the air suspension warning light illuminating.
  • Solution: Replacement of the faulty air struts, air compressor, or valve block.
  • Estimated Cost to Fix: $800 - $2,000+ per strut, $500 - $1,000 for the compressor, $300 - $600 for the valve block.
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Some owners report issues with excessive battery drain, often attributed to a faulty module not properly shutting down.
  • Solution: Diagnosis to identify the parasitic draw, followed by replacement of the faulty module.
  • Estimated Cost to Fix: $100 - $1,000+, depending on the source of the drain.
  • Recalls: None Found
• SAM (Signal Acquisition Module) Failure
  • Description/Symptoms: The SAM controls various electrical functions. Failure can lead to issues with lighting, wipers, and other electrical components.
  • Solution: Replacement of the faulty SAM unit.
  • Estimated Cost to Fix: $500 - $1,200
  • Recalls: None Found

Exterior

• Tail Light Issues
  • Description/Symptoms: The tail lights are known to have issues with bulb sockets melting or corroding, leading to intermittent or non-functional tail lights.
  • Solution: Replacement of the tail light assembly or repair of the bulb sockets.
  • Estimated Cost to Fix: $100 - $500
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: The sunroof may become stuck, make unusual noises, or fail to open or close properly.
  • Solution: Diagnosis and repair of the sunroof mechanism, which may involve cleaning, lubrication, or replacement of damaged parts.
  • Estimated Cost to Fix: $200 - $800
  • Recalls: None Found

Summary

The 2007 Mercedes-Benz GL450 is a comfortable and luxurious SUV, but potential buyers should be aware of the common issues. Engine issues like the balance shaft sprocket failure can be costly to repair. Transmission and air suspension problems are also relatively frequent. Electrical issues can be tricky to diagnose and fix. Overall, while the GL450 offers a premium driving experience, potential maintenance costs should be factored into the purchase decision.