* Based on opinions and should be considered as general guidance only.
- Reliability (3)Mercedes-Benz vehicles, while luxurious, can sometimes have average reliability ratings compared to some competitors. Expect potential for electronic glitches or minor issues as the vehicle ages, though major powertrain problems are less common.
- Maintenance (2)Maintenance costs for a luxury vehicle like the GLS 550 are significantly higher than average. Parts and labor for routine servicing and repairs can be expensive, and specialized Mercedes-Benz technicians are often required.
- Technology (4)Equipped with a comprehensive suite of advanced technology, including a user-friendly infotainment system, premium sound, and numerous driver-assistance features. While not the absolute cutting edge for 2018, it's very well-appointed.
- Comfort (5)The GLS 550 excels in comfort, offering a plush ride, exceptionally quiet cabin, and supportive seats in all three rows. Long journeys are a pleasure, and road imperfections are barely noticeable.
- Dynamics (4)For a large SUV, the GLS 550 handles surprisingly well, with a powerful engine and adaptive suspension that keeps body roll in check. It's not a sports car, but it's confident and capable.