RoadVitals

2026 Mercedes-Benz GLS 450 4MATIC Owner Complaints

Reports submitted to NHTSA by owners and drivers, shown in full

Data refreshed

Complaints on fileComplaints are reports submitted to NHTSA by owners and drivers. NHTSA does not verify most reports before publishing them, and a complaint does not establish that a defect exists. Volume is influenced by how many of a vehicle were sold, how long it has been on the road, and how much attention an issue has received.
3
+1 complaint in 30 days
Crash or fire reportedComplaints whose submitter recorded that a crash or a fire occurred. These are the reporter's own answers on the NHTSA form, not verified findings.
0
Filed in the last 12 monthsReports filed with NHTSA in the trailing 365 days. Recent volume reflects attention and vehicle age as much as anything else.
3
Reports on file since Aug 22, 2026

What this page shows

Our database holds 3 NHTSA owner-reported complaints for the 2026 Mercedes-Benz GLS 450 4MATIC. Each one is a report filed by an owner or driver and published by NHTSA without most of them being verified. A complaint is not a confirmed defect, not a recall and not a manufacturer bulletin. Narratives are shown exactly as filed.

Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.

Complaints, most recent first

Showing 1–3 of 3

Filed Nov 2, 2026

Black glass panel that fills the space between the windshield and sunroof has linear cracks that goes laterally left and right on top and bottom.

NHTSA ID
11775065
Incident
Oct 7, 2026
Other / unspecified
Filed Sep 9, 2026
1 injury reported

The contact owns a 2026 Mercedes GLS 450 4MATIC. The contact stated that while his daughter was sitting in the rear driver's side seat and attempting to exit the vehicle, the speaker on the rear driver's door scraped her right elbow. The contact stated that the screw holes for the speaker had jaggedly sharp edges, and the holes on the speakers looked like perforations on a grater. The contact stated that the other shiny metal door speakers on each door were also sharp and posed a potential injury risk. The vehicle was taken to a dealer. The dealer did not believe that the screw holes on the speaker were sharp. The failure mileage was approximately 2,000.

NHTSA ID
11763023
Incident
Aug 6, 2026
Mileage
2,000 mi
Engine
Filed Aug 22, 2026

On Thursday, August 20th at approxmately 5:30PM my 2026 Mercedes Benz suffered a catastrophic transfer case failure and driveshhaft failure at highways speeds, causing a complete loss of propulsion. Putting me in immediate danger of on coming traffic. After the got to the shoulder I waited about 3 plus hours in pouring rain waiting for Mercedes Benz roadside assistance. The safety of this vehicle put me, my wife and family in immediate danger if this happens again. I do have a video I cannot upload as is is too large, but have loaded an image of the car in service showing transfer case. Please let me know how i can share the video.

NHTSA ID
11758717
Incident
Aug 20, 2026

Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.

Data sources

Data on this page last refreshed .