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Mercedes-Benz GLS-Class
2021 · 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 economy21 mpg (US gallons)Measured by EPA · configuration: GLS450 4matic
Tailpipe CO₂257 g/kmMeasured by EPA · CO₂ basis: tailpipe_rated · configuration: GLS450 4matic · also 414 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 (257 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

Fuel$14,191
Insurance$11,440 (modelled)
Maintenance$7,800 (class estimate)
Repairs$8,000 (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 13,800 miles a year at $4.319 a US gallon of petrol (U.S. Energy Information Administration, Gasoline and Diesel Fuel Update: U.S. regular gasoline retail price, all formulations, weekly, 2026-09-14). 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
16 complaint(s) · 3 report a crash, fire, injury or death
Vehicle would not start on 3 separate occasions. The instrument panel indicated it was the 48v battery. Had it towed to Mercedes dealership to have 48v battery replaced.
UNKNOWN OR OTHER
8 complaint(s) · 2 report a crash, fire, injury or death
The car would not start and could not be jumped. I'm told it's the 48V battery has to be replaced. I have seen on the internet numerous people have the same problem and that a large batch of these 48V…
ENGINE
5 complaint(s) · 1 reports a crash, fire, injury or death
FUEL SYSTEM, GASOLINE
2 complaint(s)
The contact owns a 2021 Mercedes-Benz GLS450. The contact received notification of 23V445000 (Fuel System, Gasoline) however, the part to do the recall repair was unavailable. The contact stated that…
SEATS
2 complaint(s) · 2 report a crash, fire, injury or death
VISIBILITY/WIPER
2 complaint(s)
Continuous malfunctioning front windshield wipers. In light to medium rain/wet condition the wipers chatter/jump on the windshield, leaving residue on windshield and causing substantial distraction to…
ELECTRICAL SYSTEM:12V/24V/48V BATTERY
1 complaint(s)
2021 MERCEDES BENZ GLS450. CONSUMER WRITES IN REGARDS TO48-VOLT BATTERY SYSTEM FAILURE. THE CONSUMER STATED THE HAS FAILED TWICE, A YEAR APART. THE DASHBOARD DISPLAYED "48-VOLT BATTERY FAILURE" AND…
FORWARD COLLISION AVOIDANCE
1 complaint(s)
The contact owns a 2021 Mercedes-Benz GLS63. The contact stated while driving at various speeds, the collision warning sensor was activated with an audio alarm and warning on the display screen. The c…
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
1 complaint(s)
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL:SOFTWARE
1 complaint(s)

The 10 components named in the most complaints are shown, of 21 named in all.

Data sources