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Mercedes-Benz GLS 450 4MATICModel year report

2023 Mercedes-Benz GLS 450 4MATIC Problems

Complaints
7filed with NHTSA
Median mileage
11,000miles, 1 complaints with mileage
Recalls
5campaigns 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
20 mpgcombined, 3.0L 6-cyl · hybrid AWD · 18 city / 23 hwy

Sources: NHTSA records for the 2023 Mercedes-Benz GLS 450 4MATIC (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 7 consumer complaints for the 2023 Mercedes-Benz GLS 450 4MATIC. The part named most often is brakes, with 4 complaints (57% of the total), followed by engine (3) and forward collision avoidance (2). 1 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 11,000 miles. NHTSA lists 5 recall campaigns and 229 technical service bulletins for this model year. Brakes complaints overlap with 10 technical service bulletins filed under the same part. Engine complaints overlap with 10 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.

Example complaints

Brakes: “when coming to a stop and applying the break, the transmission stalled. a warning was issued around lane keeping assist and a second warning. Then the transmission light was on. It was not at risk in the moment because no one was behind me and I was coming to a stop sign. If it prevented me from stopping I might have gone through the stop sign It is at the dealership today to service. no warning lamps, messages or other symptoms.”

NHTSA complaint #11609931, filed 2024-08

Engine: “Twice the vehicle has stalled while driving. I see that there is a recall on my model for a faulty fuel pump which causes this problem, but my dealer claims my vehicle is not part of the recall even though it is having the same issue.”

NHTSA complaint #11548136, filed 2023-10

Forward collision avoidance: “The car recently underwent a software update at the dealership for a backup camera issue. When I was driving home on the highway, the car suddenly braked and the seat belts automatically tightened up. This happened 3 additional times on the highway about 5 days later. I had turned off the automatic braking system and it seemed to go away. Then, with the system off, we experienced this again yesterday while on the highway at 70mph. The braking lasts for 1-3 seconds. There is no audible alert or dashboard display. …”

NHTSA complaint #11654449, filed 2025-04

Fuel system: “The contact owns a 2023 Mercedes-Benz GLS450. The contact received notification of NHTSA Campaign Number: 23V880000 (Fuel System Gasoline) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact stated while driving approximately 10 MPH and making a left turn, the vehicle stalled. The contact stated that an unknown warning was illuminated; however, when the vehicle was restarted, the warning light was off. …”

NHTSA complaint #11604201, filed 2024-07, 11,000 miles

Mileage when problems were reported

100% of the 1 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 11,000 and 11,000 miles.

0%0–10100%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 (1 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 11,000 miles.

Complaints by year filed

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

20233202432025
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 2023 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 automatic182320$4,100

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 2023 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. 229 on record; the latest 10 are shown.

See all 229 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 2023 Mercedes-Benz GLS 450 4MATIC have?

NHTSA recorded 7 consumer complaints for the 2023 Mercedes-Benz GLS 450 4MATIC as of Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2023 Mercedes-Benz GLS 450 4MATIC is reported most often?

Brakes is named most often, in 4 complaints (57% of the total), followed by engine with 3.

Has the 2023 Mercedes-Benz GLS 450 4MATIC been recalled?

NHTSA lists 5 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2023 Mercedes-Benz GLS 450 4MATIC get?

The EPA rates the 2023 Mercedes-Benz GLS 450 4MATIC (GLS450 4matic, 3.0L 6-cyl · hybrid) at 20 mpg combined, 18 city and 23 highway, with an estimated annual fuel cost of $4,100 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2023 Mercedes-Benz GLS 450 4MATIC reported?

Among the 1 complaints that include a mileage, the median is 11,000 miles and the middle half falls between 11,000 and 11,000 miles; 100% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 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.