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Mercedes-Benz GLS-Class
2025 · gas, suv
6 measured figures
6 of the 9 figures this market publishes for a car like this one are measured for this car. This market publishes no overall score, so there is no share of a composite weight to measure confidence against; figures_measured says how many of this market's figures the row carries, and contributing_publishers says who measured them

Measured figures

Fuel economy20.8 mpg (US gallons)Measured by NRCan · configuration: GLS 450 4MATIC SUV · also 11.3 L/100 km
Tailpipe CO₂266 g/kmMeasured by NRCan · CO₂ basis: tailpipe_rated · configuration: GLS 450 4MATIC SUV · also 428 g/mile
HorsepowerFree with an accountMeasured for this car, with its publisher and basis
EPA test weightFree with an accountMeasured for this car, with its publisher and basis
WarrantyFree with an accountMeasured for this car, with its publisher and basis
Recall campaignsFree with an accountMeasured for this car, with its publisher and basis

4 more measured figures for this car — Horsepower, EPA test weight, Warranty, Recall campaigns — each with the publisher that measured it and the basis it is on. Free to read with an account.

Figures this car does not carry

Fuel economy (MPGe)Not published for this carFuel economy (MPGe) is published for electric and hydrogen cars, whose economy is published as MPGe: energy converted at 33.7 kWh per gallon, not fuel burned; this car is not one of them, so the figure is not the same quantity for it
Tailpipe CO₂ (charge-weighted)Not published for this carthis car's CO₂ is published as the tailpipe rating for the car driven as rated on the test cycle (266 g/km), not as a composite weighted across electric and fuel-burning miles, so it is not the quantity this list orders. It is published as Tailpipe CO₂
Engine horsepowerNot published for this carNot published for this car. The record's own reason is free to read with an account.
Kerb weightNot published for this carNot published for this car. The record's own reason is free to read with an account.
NHTSA overall ratingNot published for this carNot published for this car. The record's own reason is free to read with an account.
Complaints per 10,000 builtNot published for this carNot published for this car. The record's own reason is free to read with an account.
PriceNot published for this carNot published for this car. The record's own reason is free to read with an account.

5-Year Running Costs

FuelUS$10,753
InsuranceUS$7,220 (modelled)
MaintenanceUS$7,800 (class estimate)
RepairsUS$7,875 (modelled)
Depreciationnot estimated — we hold no purchase price for this car, and it is not assumed.
Totalnot estimated — a component above is unknown or modelled

Running costs only — the purchase price is not included. The five-year running cost is an ESTIMATE, not a measurement of this car: only its fuel half is computed from the car's own measured consumption and a dated pump price (see fuel_price_source and fuel_price_as_of in the market's own figures); insurance, maintenance and repairs are class models. It orders no list and is not one of this market's published figures. Fuel is this car's own combined consumption over 15,000 km a year at 1.738 CAD a litre of petrol (Statistics Canada. Table 18-10-0001-01 Monthly average retail prices for gasoline and fuel oil, by geography; Canada; regular unleaded gasoline at self service filling stations, 2026-08). Adapted from Statistics Canada, Table 18-10-0001-01 Monthly average retail prices for gasoline and fuel oil, by geography, August 2026. This does not constitute an endorsement by Statistics Canada of this product. Costs are in US dollars; the CAD pump price is converted at 1 CAD = 0.73 USD, the rate set on 2026-09-13. Insurance, maintenance and repairs are models, not figures for this car: insurance from its power, weight and crash rating, maintenance from its make's class, repairs from its complaint and recall counts. They are shown for scale and are not used to rank it. Confidence is low: several components are modelled from class averages.

Known Issues

ELECTRICAL SYSTEM
2 complaint(s)
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.…
SERVICE BRAKES
2 complaint(s)
Brake pads completely worn after 11K miles - this seems like premature wear and like there is a potential issue with the braking system on the GLS450.
ENGINE
1 complaint(s)
ENGINE AND ENGINE COOLING
1 complaint(s)
FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING
1 complaint(s) · 1 reports a crash, fire, injury or death
LANE DEPARTURE: ASSIST
1 complaint(s) · 1 reports a crash, fire, injury or death
LATCHES/LOCKS/LINKAGES:DOORS:LATCH
1 complaint(s) · 1 reports a crash, fire, injury or death
My Mercedes GLS 580 has a soft-close doors feature. Upon getting my 2 year old out of the car, he pushes the door closed with his left hand while his right hand was between the front driver side door…
POWER TRAIN
1 complaint(s)
I made a left turn and the rear passenger side axle broke. I didn’t hit anything.
SEAT BELTS
1 complaint(s)
We recently noticed visible damage to one of the seatbelts in our 2025 Mercedes-Benz GLS450. The affected component is the seatbelt webbing. The belt has visible fraying and pulled/cut fibers along th…
STEERING
1 complaint(s) · 1 reports a crash, fire, injury or death

The 10 components named in the most complaints are shown, of 13 named in all.

These complaints are filed under GLS 450 4MATIC, GLS 580 4MATIC, names that include one NHTSA also uses for other versions of this car, so some may concern those versions.

Data sources