RoadVitals

2027 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.
1
+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.
1
Reports on file since Oct 26, 2026

What this page shows

Our database holds 1 NHTSA owner-reported complaint for the 2027 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 1–1 of 1

Engine
Filed Oct 26, 2026

Engine oil specification and quantity is not provided. New vehicles did not come with a printed owners manual, and the online manual (July 2026 and Jan 2027 versions) do not specify what oil type to put in the vehicle. It is nowhere to be found in the owners documentation - at risk of putting the wrong oil in.

NHTSA ID
11773606
Incident
Oct 26, 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 .