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Mercedes-Benz GLS 450Model year report

2019 Mercedes-Benz GLS 450 Problems

Complaints
24filed with NHTSA
Median mileage
31,415miles, 9 complaints with mileage
Recalls
3campaigns on record
Trend
RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA crash rating
—no overall rating published
EPA fuel economy
18 mpgcombined, 3.0L 6-cyl 4WD · 16 city / 22 hwy

Sources: NHTSA records for the 2019 Mercedes-Benz GLS 450 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 24 consumer complaints for the 2019 Mercedes-Benz GLS 450. The part named most often is other or unknown, with 6 complaints (25% of the total), followed by electrical system (3) and engine (3). 9 of the complaints include a mileage, and 78% of those were filed for vehicles with under 50,000 miles; the median is 31,415 miles. Of all complaints, 1 involved a crash, 1 a fire, 2 an injury, according to the filers. NHTSA lists 3 recall campaigns and 126 technical service bulletins for this model year. Other or unknown complaints overlap with 3 technical service bulletins filed under the same part. Electrical system complaints overlap with 3 recall campaigns and 41 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: Fuel system (1), Steering (1), Tires (1), Vehicle speed control (1).

Example complaints

Other or unknown: “Backup safety alert system design is inadequate. Exterior sensors are insensitive or erratic, warning buzzer is faint-to-inaudible, especially if there is other ambient noise such as radio playing, and warning buzzer sound level is not adjustable. Warning lights that are coupled to the audible alert are remote from the driver, not visible without turning driver's body around 180 degrees, which is not possible for many drivers. …”

NHTSA complaint #11204094, filed 2019-04, 10 miles

Electrical system: “Driving on freeway at ̃75mph toward 202 w arizona freeway, dashboard showed a engine malfunction + 48 v battery see operator's manual:. 1 minute later another error on screen saying, coolant off turn engine off. Then the car lost the power in the middle lane off freeway. Luckily no cars behind us. Car in service at mercedes dealer in chandler az”

NHTSA complaint #11288497, filed 2019-12, 13,000 miles

Engine: “I am reporting a serious safety defect in my 2019 Mercedes-Benz GLS450. My vehicle experienced low oil pressure warnings and engine warning lights, which were diagnosed as a faulty oil pump solenoid valve. The repair required removing major engine components, resulting in a cost of $5,000 that I paid personally. It is important to note that Mercedes-Benz updated the valve design in the following model year, indicating that the company was aware of a defect in the original design. …”

NHTSA complaint #11739507, filed 2026-05

Engine cooling: “The contact owns a 2019 Mercedes-Benz GLS450. The contact stated that while operating the vehicle, the check engine warning light remained illuminated, and the vehicle was jerking and hesitating while attempting to accelerate. The vehicle was taken to the local dealer who diagnosed and determined that the oil pump and check valve were faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure. The failure mileage was 38,000.”

NHTSA complaint #11616591, filed 2024-09, 38,000 miles

Mileage when problems were reported

78% of the 9 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 13,000 and 38,000 miles.

22%0–1022%10–2533%25–5011%50–7511%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (9 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 31,415 miles.

Complaints by year filed

Trend: rising. Complaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.

2019202020212022202320245202520265
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 2019 Mercedes-Benz GLS 450 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 4WD3.0L 6-cyl9-speed automatic162218$4,550

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 2019 Mercedes-Benz GLS 450 → · 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. 126 on record; the latest 10 are shown.

See all 126 bulletins →

Other model years of the Mercedes-Benz GLS 450

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
20213111,00012—2154 · TypicalRising
2020364,20022—2150 · TypicalRising
20192431,4153—18—Rising
2018148,0003—19—Not enough data
20173513,0008—1943 · TypicalRising

All Mercedes-Benz GLS 450 model years · Best and worst years by complaints

Frequently asked questions

How many NHTSA complaints does the 2019 Mercedes-Benz GLS 450 have?

NHTSA recorded 24 consumer complaints for the 2019 Mercedes-Benz GLS 450 as of Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2019 Mercedes-Benz GLS 450 is reported most often?

Other or unknown is named most often, in 6 complaints (25% of the total), followed by electrical system with 3.

Has the 2019 Mercedes-Benz GLS 450 been recalled?

NHTSA lists 3 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2019 Mercedes-Benz GLS 450 get?

The EPA rates the 2019 Mercedes-Benz GLS 450 (GLS450 4matic, 3.0L 6-cyl) at 18 mpg combined, 16 city and 22 highway, with an estimated annual fuel cost of $4,550 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2019 Mercedes-Benz GLS 450 reported?

Among the 9 complaints that include a mileage, the median is 31,415 miles and the middle half falls between 13,000 and 38,000 miles; 78% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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.