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Mercedes-Benz S-Class
2021 · gas
7 measured figures
7 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 economy24 mpg (US gallons)Measured by EPA · configuration: S500 4matic
Tailpipe CO₂231 g/kmMeasured by EPA · CO₂ basis: tailpipe_rated · configuration: S500 4matic · also 372 g/mile
HorsepowerFree with an accountMeasured for this car, with its publisher and basis
Kerb weightFree 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

5 more measured figures for this car — Horsepower, Kerb weight, 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 (231 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.
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$12,417
Insurance$13,870 (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
9 complaint(s) · 1 reports a crash, fire, injury or death
Upon startup, the back up camera will not display when putting the car in reverse. I could not see if any pedestrians were behind me when backing out of a parking spot. This problem has happened 2 t…
WHEELS
6 complaint(s)
I have had one tire blow out after traveling over a moderate pot hole, and 3 other tires that have been damaged with "bubbles" due to excessive stress from normal driving. In addition to the damaged t…
ENGINE AND ENGINE COOLING
5 complaint(s)
The contact owns a 2021 Mercedes-Benz S580. The contact received a notification for NHTSA Campaign Number: 21V843000 (Engine and Engine Cooling) however, the part to do the recall repair was unavailab…
UNKNOWN OR OTHER
4 complaint(s) · 1 reports a crash, fire, injury or death
Car was in for recall Dec 7,2025 to Mercedes Benz of Rockville Centre service 110 Graham Avenue Hempstead Ny they are having difficulties with the recall it is now Dec 30, 2025 still not repaired the…
ENGINE
3 complaint(s)
The vehicle lost acceleration and the check engine light came on. I took the vehicle to Mercedes dealership. They quoted that the Camtronic actuator has failed and needs to be replaced. Cost $9000.…
SERVICE BRAKES
3 complaint(s) · 2 report a crash, fire, injury or death
COMMUNICATION
2 complaint(s)
EXTERIOR LIGHTING
2 complaint(s)
Adaptive High Beam Assist function on vehicle with Multibeam LED headlights with Digital Light System fail to detect ambient lighting properly. Consequently hi-beam lights operate erratically and unp…
LANE DEPARTURE: WARNING
2 complaint(s) · 1 reports a crash, fire, injury or death
VEHICLE SPEED CONTROL
2 complaint(s) · 1 reports a crash, fire, injury or death

The 10 components named in the most complaints are shown, of 28 named in all.

These complaints are filed under S 500, S 580, names that include one NHTSA also uses for other versions of this car, so some may concern those versions.

Data sources