Skip to content
Mercedes-Benz GLS 450 4MATICModel year report

2025 Mercedes-Benz GLS 450 4MATIC Problems

Compared with other Mercedes-Benz GLS 450 4MATIC years

Too new to compare

Based only on NHTSA complaints, recalls and investigations. Not adjusted for how many vehicles were sold, and not a reliability rating. How this is calculated

Complaints
7filed with NHTSA
Median mileage
10,000miles, 3 complaints with mileage
Recalls
1campaigns on record
Trend
Too newThis model year is less than 4 years old, so a trend is not meaningful yet.
NHTSA crash rating
—no overall rating published
EPA fuel economy
21 mpgcombined, 3.0L 6-cyl · hybrid AWD · 19 city / 24 hwy

Sources: NHTSA records for the 2025 Mercedes-Benz GLS 450 4MATIC (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 7 consumer complaints for the 2025 Mercedes-Benz GLS 450 4MATIC. The part named most often is brakes, with 2 complaints (29% of the total), followed by electrical system (2) and engine (1). 3 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 10,000 miles. Of all complaints, 1 involved a crash, 1 an injury, according to the filers. NHTSA lists 1 recall campaign and 127 technical service bulletins for this model year. Brakes complaints overlap with 8 technical service bulletins filed under the same part. Electrical system complaints overlap with 55 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Also reported: Visibility (wipers, defrost, mirrors) (1).

Example complaints

Brakes: “I am writing to file a formal complaint regarding a serious malfunction of the Automatic Emergency Braking (AEB) system. This malfunction caused my vehicle to unexpectedly perform an emergency stop without a valid cause, resulting in significant damage to its suspension system. Incident Details: •Date of Incident: Friday, December 5, 2025, between 10:45 am and 11:15 am ET •Location: Community Baptist Church of Englewood, 224 1St, Englewood, New Jersey. …”

NHTSA complaint #11703696, filed 2025-12

Electrical system: “The contact owns a 2025 Mercedes-Benz GLS450 4Matic. The contact stated that while driving at various speeds, a safety feature with a white speed limit sign started flashing on the instrument cluster. The contact stated the flashing was a constant issue. The vehicle was taken to the local dealer several times. The contact was informed by the dealer that it was a known issue and that the manufacturer was still developing a fix. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was 5,265.”

NHTSA complaint #11721777, filed 2026-03, 5,265 miles

Engine: “The contact owns a 2025 Mercedes-Benz GLS450 4Matic. The contact stated that while driving at an undisclosed speed, the engine overheated, with several unknown warning lights illuminated. The vehicle was taken to the dealer, where it was diagnosed that the coolant pump had failed and needed to be replaced. The vehicle was repaired. The contact then stated that while driving at an undisclosed speed, there was a metallic clicking sound was coming from the engine compartment, and there were no warning lights illuminated. …”

NHTSA complaint #11692173, filed 2025-10, 14,050 miles

Mileage when problems were reported

100% of the 3 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 5,265 and 14,050 miles.

33%0–1067%10–250%25–500%50–750%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (3 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 10,000 miles.

Complaints by year filed

This model year is less than 4 years old, so a trend is not meaningful yet.

202520264
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Fuel economy and running cost

EPA ratings for each 2025 Mercedes-Benz GLS 450 4MATIC version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
GLS450 4matic AWD3.0L 6-cyl · hybrid9-speed automatic192421$3,900

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2025 Mercedes-Benz GLS 450 4MATIC → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 127 on record; the latest 10 are shown.

See all 127 bulletins →

Other model years of the Mercedes-Benz GLS 450 4MATIC

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2025710,0001—21—Too new
202415—0—21—Too new
2023711,0005—20—Too new
20221725,10010—20—Rising

All Mercedes-Benz GLS 450 4MATIC model years

Frequently asked questions

How many NHTSA complaints does the 2025 Mercedes-Benz GLS 450 4MATIC have?

NHTSA recorded 7 consumer complaints for the 2025 Mercedes-Benz GLS 450 4MATIC as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2025 Mercedes-Benz GLS 450 4MATIC is reported most often?

Brakes is named most often, in 2 complaints (29% of the total), followed by electrical system with 2.

Has the 2025 Mercedes-Benz GLS 450 4MATIC been recalled?

NHTSA lists 1 recall campaign for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2025 Mercedes-Benz GLS 450 4MATIC get?

The EPA rates the 2025 Mercedes-Benz GLS 450 4MATIC (GLS450 4matic, 3.0L 6-cyl · hybrid) at 21 mpg combined, 19 city and 24 highway, with an estimated annual fuel cost of $3,900 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2025 Mercedes-Benz GLS 450 4MATIC reported?

Among the 3 complaints that include a mileage, the median is 10,000 miles and the middle half falls between 5,265 and 14,050 miles; 100% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.