mercedes-benz GLS-Class problems
0 safety recalls. 34 owner complaints. We mapped every trouble spot before you sign the papers.
Solid reliability overall. Common issues are concentrated in a few systems.
Top trouble spots 2 categories with 3+ complaints
What owners are saying recent NHTSA-filed complaints · verbatim
Vehicle would not start. 48v battery light came on. Waited 15 minutes, vehicle started, drove to dealership who did diagnosis. Battery replacement required $1800 + $1200 labor. 2020 vehicle with 61K miles. Bought certified vehicle from MBZ dealership, added a MBZ 3 year or 100K…
The fuel rail system failed on the passenger side of the engine and leaks. This is the same issue seen on, but VIN number isn't apart of it: Campaign No. : 2022030003 CA DMV. : 220303 NHTSA ID 21V961 I have taken the vehicle to a Mercedes dealer twice for the concern of…
CLIP MISSING FROM RIGHT HAND SIDE PASSENGER SEAT (2ND ROW), CAUSING THE SEAT TO FOLD ALL THE WAY FORWARD MULTIPLE TIMES ON ITS OWN. THIS HAPPENED WHEN THE CAR WAS STATIONARY. THE DEALERSHIP FIXED THE ISSUE AND ADDED THE MISSING CLIP.
The vehicle warnign system displayed "48v Malfunction." Vehicke lost all acceleration in the middle of the highway. The vehicle was just returned3 days ago after undergoing a state inspection at the MB dealership. In looking at the issue on line this appears to be a known…
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
Common questions
Is the 2020 Mercedes-Benz GLS-Class reliable?
Mostly yes. With a reliability score of 8.4 out of 10 based on 34 owner complaints filed with NHTSA, the 2020 Mercedes-Benz GLS-Class is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.
What's the most common problem on the 2020 Mercedes-Benz GLS-Class?
Based on NHTSA records, the most-reported issue is electrical, with 15 complaints filed. Average repair cost runs about $850 at an independent shop.
What's the most expensive thing that goes wrong?
The electrical is one of the costlier repair items. Average repair cost runs about $850 at an independent shop. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my Mercedes-Benz GLS-Class has open recalls?
Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.
Is an extended warranty worth it on a 2020 Mercedes-Benz GLS-Class?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 34 complaints on file and the costliest repair averaging $850, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans aren't always better value.