The 2017 Mercedes-Benz GLS is a full-size luxury SUV designed to deliver three-row comfort with premium materials, strong towing capability, and confident all-weather performance. Often called the “S-Class of SUVs,” it sits near the top of the segment for ride quality and cabin refinement, making it ideal for families and drivers who want a flagship feel without moving to a sedan. For 2017, the GLS continues the first-generation GLS (X166), introduced after the GL-Class naming change, with a focus on smooth powertrains and available advanced driver assistance tech. It competes with other high-end three-row SUVs by emphasizing comfort, prestige, and highway composure.

1) Engine options for different needs: GLS 450 models use a 3.0L twin-turbo V6, while GLS 550 models step up to a 4.7L twin-turbo V8 for quicker acceleration and effortless passing power. A high-performance AMG GLS 63 variant is also available with a hand-built 5.5L twin-turbo V8 for drivers prioritizing speed and sound. 2) 4MATIC all-wheel drive availability: Many 2017 GLS trims are equipped with Mercedes-Benz 4MATIC for improved traction in rain and snow, plus more stable launches and cornering on low-grip surfaces. 3) Three-row practicality: Adult-friendly space in the first two rows, available power-folding third row, and a large cargo area make it well-suited for carpools, road trips, and long-haul family use. 4) Air suspension and comfort tuning: Available AIRMATIC air suspension helps deliver the smooth, controlled ride GLS buyers expect, and it can improve leveling when loaded with passengers or cargo. 5) Premium safety and driver assistance: Depending on equipment, features can include blind spot monitoring, lane keeping assistance, adaptive cruise control, and parking assistance systems that make this large SUV easier to manage.

Shoppers researching 2017 Mercedes-Benz GLS reliability often find that it can be a solid long-distance cruiser when maintained properly, but ownership is more expensive than mainstream SUVs and some issues can be costly if ignored. Commonly reported 2017 Mercedes-Benz GLS problems and 2017 Mercedes-Benz GLS common issues include: 1) Air suspension leaks or compressor wear (often 60,000–100,000 miles): Vehicles equipped with AIRMATIC may develop leaking air struts or a tired compressor, leading to sagging overnight, “vehicle rising slowly,” or warning lights. Repair costs can be significant, so consistent inspection matters. 2) Oil leaks and seepage (50,000–90,000 miles): Some owners report oil seepage from seals or gaskets as mileage increases. Symptoms include oil smell, spots on the driveway, or low oil level between services. 3) Electrical and infotainment glitches (varies by mileage): COMAND/infotainment freezing, Bluetooth connection issues, and sensor-related warnings (parking sensors, cameras, or driver-assist alerts) can occur. These are often annoying rather than catastrophic, but diagnosis can take time. 4) Brake wear and vibration under braking (30,000–60,000 miles): The GLS is heavy, and frequent city driving can accelerate pad and rotor wear. Some drivers notice steering shake during braking when rotors wear unevenly or overheat.