2017 Mercedes-Benz GLS350d

The 2017 Mercedes-Benz GLS350d is a luxury SUV known for its spacious interior, comfortable ride, and elegant design. The GLS350d is equipped with a 3.0-liter V6 diesel engine producing 255 horsepower and 455 lb-ft of torque. Other engine options for the 2017 GLS include the GLS450 with a 3.0-liter V6 gasoline engine, the GLS550 with a 4.7-liter V8 gasoline engine, and the AMG GLS63 with a 5.5-liter V8 gasoline engine. All models typically come with a 9-speed automatic transmission. Owners often appreciate the GLS’s luxurious features, smooth ride, and ample cargo space. Common dislikes include its high price tag, potential for expensive repairs, and complex infotainment system.

Engine

3.0L V6 Diesel (GLS350d)

• Oil Leaks from Oil Filter Housing/Cooler
  • Description/Symptoms: Oil leaks are reported around the oil filter housing or cooler area, leading to oil consumption and potential low oil pressure. Visible oil drips may appear under the vehicle.
  • Solution: Replacement of the oil filter housing or oil cooler seals is required.
  • Estimated Cost to Fix: $400 - $1,000+
• Diesel Particulate Filter (DPF) Issues
  • Description/Symptoms: The DPF can become clogged, especially with frequent short trips. This leads to reduced engine performance, increased fuel consumption, and illumination of the DPF warning light.
  • Solution: Forced regeneration of the DPF may be attempted. If unsuccessful, the DPF may need to be replaced.
  • Estimated Cost to Fix: $500 - $2,500+

Transmission

9-Speed Automatic (9G-Tronic) - All Models

• Rough Shifting/Hesitation
  • Description/Symptoms: Some owners have reported experiencing rough shifting, hesitation between gears, or occasional clunking noises, particularly during downshifts or low-speed operation.
  • Solution: A software update to the transmission control module (TCM) is the first step. If the problem persists, valve body replacement or transmission rebuild may be necessary.
  • Estimated Cost to Fix: $200 (software update) - $4,000+ (rebuild/replacement)

Suspension

• Air Suspension Malfunctions (Airmatic)
  • Description/Symptoms: The Airmatic air suspension system can experience leaks in the air struts, compressor failure, or problems with the ride height sensors. Symptoms include uneven ride height, a sagging vehicle, and warning lights on the dashboard.
  • Solution: Replacement of the faulty air strut, air compressor, or ride height sensor is typically required. Sometimes all three have to be replaced at the same time.
  • Estimated Cost to Fix: $800 - $3,000+ per strut. $500 - $1,500 for the compressor. $200 - $500 for the sensor.

Electrical

• Malfunctioning Infotainment System (COMAND)
  • Description/Symptoms: The COMAND infotainment system can experience glitches, freezing, or complete failure. This includes navigation issues, audio problems, and screen malfunctions.
  • Solution: Software updates are often the first step. If the problem persists, the COMAND unit may need to be replaced.
  • Estimated Cost to Fix: $0 (software update) - $2,000+ (replacement)
• Battery Drain Issues
  • Description/Symptoms: Some owners have reported issues with the battery draining prematurely, especially if the vehicle is not driven frequently.
  • Solution: Identify the source of the drain (e.g., faulty module, improperly shut-off system) and repair or replace the affected component. Battery replacement might also be needed.
  • Estimated Cost to Fix: $100 - $500+

Exterior

• No Issues Found

Interior

• Sunroof Issues
  • Description/Symptoms: The sunroof can become stuck, make excessive noise, or leak. This can be caused by a malfunctioning motor, damaged tracks, or clogged drain tubes.
  • Solution: Repair or replacement of the sunroof motor, cleaning and lubrication of the tracks, or clearing of the drain tubes.
  • Estimated Cost to Fix: $100 - $1,500+

Recalls

• Recall Number 2021070001 Description: The bracket of the 12-volt battery ground connection may not be properly attached. This could cause the electric resistance to increase and might cause a fire.
• Recall Number 21V389000 Description: Due to a software issue, the emergency call (eCall) system may transmit an incorrect vehicle location if a crash occurs.
• Recall Number 18V789000 Description: On vehicles equipped with a diesel engine, the diesel fuel filter might leak fuel into the engine compartment.

Summary

The 2017 Mercedes-Benz GLS350d can be a luxurious and comfortable SUV. However, potential buyers should be aware of common issues such as oil leaks, DPF problems, transmission quirks, air suspension malfunctions, and electrical glitches. The severity of these issues can range from minor inconveniences to expensive repairs. The air suspension and diesel engine components are particularly prone to costly repairs. Potential buyers should have a pre-purchase inspection performed by a qualified mechanic to identify any existing or potential problems.