2016 Mercedes-Benz GL450

The 2016 Mercedes-Benz GL450 is a luxurious and capable SUV that offers a blend of comfort, performance, and versatility. The GL450 is equipped with a 3.0-liter twin-turbocharged V6 engine producing 362 horsepower and 369 lb-ft of torque. Other engine options for the 2016 GL-Class include the GL350 BlueTEC with a 3.0-liter turbodiesel V6, the GL550 with a 4.7-liter twin-turbocharged V8, and the AMG GL63 with a 5.5-liter twin-turbocharged V8. All models were paired with a 7G-TRONIC seven-speed automatic transmission. Owners often praise the GL450 for its spacious interior, smooth ride, and powerful engine, while some criticisms include the high running costs, complicated electronics, and potential for expensive repairs.

Engine

3.0L Twin-Turbocharged V6 (M276)

• Oil Leaks from Timing Chain Covers
  • Description/Symptoms: Oil leaks originating from the front timing chain covers of the engine. This can lead to oil consumption, visible oil residue on the engine, and a burning oil smell.
  • Solution: Replacement of the timing chain cover gaskets and resealing the covers.
  • Estimated Cost to Fix: $1,200 - $2,000+
  • Recalls: None Found
• Camshaft Adjuster Solenoid (Cam Phasers) Issues
  • Description/Symptoms: Faulty camshaft adjuster solenoids (cam phasers) can cause rough idling, reduced engine performance, and potential engine knocking or misfires.
  • Solution: Replacement of the faulty camshaft adjuster solenoids.
  • Estimated Cost to Fix: $500 - $1,200+
  • Recalls: None Found

Transmission

7G-TRONIC Seven-Speed Automatic (722.9)

• Valve Body Issues
  • Description/Symptoms: The 722.9 transmission can suffer from valve body problems, leading to harsh or erratic shifting, delayed engagement, and potentially getting stuck in gear.
  • Solution: Replacement or rebuild of the valve body.
  • Estimated Cost to Fix: $1,500 - $3,500+
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibration at low speeds, especially during acceleration. Can also present as unusual noises from the transmission area.
  • Solution: Replacement of the torque converter.
  • Estimated Cost to Fix: $1,800 - $4,000+
  • Recalls: None Found

Suspension

• Airmatic Suspension Failure
  • Description/Symptoms: The Airmatic air suspension system is prone to leaks and component failures, causing the vehicle to sag, ride harshly, or have uneven ride height. The air compressor can also fail.
  • Solution: Replacement of leaking air struts, air compressor, or associated valves/lines.
  • Estimated Cost to Fix: $1,000 - $3,000+ per corner for strut replacement; $800 - $1,500 for compressor replacement.
  • Recalls: None Found

Electrical

• Battery Drain Issues
  • Description/Symptoms: Premature battery drain, especially if the vehicle is not driven frequently. This can be caused by various electronic modules not shutting down properly.
  • Solution: Diagnosis and repair of the parasitic drain, which may involve updating software, replacing faulty modules, or repairing wiring issues.
  • Estimated Cost to Fix: $200 - $1,000+ depending on the source of the drain.
  • Recalls: None Found
• COMAND System Malfunctions
  • Description/Symptoms: The COMAND infotainment system can experience glitches, freezes, and failures of various functions like navigation, audio, and Bluetooth connectivity.
  • Solution: Software updates, module resets, or replacement of the COMAND unit.
  • Estimated Cost to Fix: $300 - $2,000+ depending on the complexity of the issue.
  • Recalls: None Found

Exterior

• Sunroof Issues
  • Description/Symptoms: Sunroof malfunctions, including getting stuck open or closed, making excessive noise during operation, or leaking water.
  • Solution: Repair or replacement of the sunroof motor, tracks, or seals.
  • Estimated Cost to Fix: $300 - $1,500+
  • Recalls: None Found

Interior

• Dashboard Cracking
  • Description/Symptoms: Cracking dashboards, particularly in warmer climates.
  • Solution: Dashboard replacement or repair.
  • Estimated Cost to Fix: $800 - $2,500+
  • Recalls: None Found
• Power Seat Malfunctions
  • Description/Symptoms: Power seats failing to adjust properly or at all.
  • Solution: Repair or replacement of seat motors, switches, or wiring.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found

Summary

The 2016 Mercedes-Benz GL450 offers a luxurious driving experience but is not without its potential problems. Issues like timing chain cover leaks, valve body problems, and Airmatic suspension failures can lead to significant repair costs. Electrical gremlins and interior trim issues add to the potential ownership expenses. While not every GL450 will experience all of these problems, prospective buyers should be aware of these common issues and factor them into their purchasing decision. The severity and cost of repairs range from relatively minor electrical fixes to more extensive and expensive engine or suspension overhauls.