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Mercedes-Benz C-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 economy27 mpg (US gallons)Measured by NRCan · configuration: C 300 4MATIC Sedan · also 8.7 L/100 km
Tailpipe CO₂204 g/kmMeasured by NRCan · CO₂ basis: tailpipe_rated · configuration: C 300 4MATIC Sedan · also 328 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 (204 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

FuelUS$8,279
InsuranceUS$7,440 (modelled)
MaintenanceUS$7,800 (class estimate)
RepairsUS$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 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

ENGINE
8 complaint(s)
Piston Connecting Rod broke and left the engine making holes in both sides of the block; Mercedes Benz rejected any responsibility because the car has a branded title. Currently a new engine (brand ne…
AIR BAGS
2 complaint(s)
The contact owns a 2021 Mercedes-Benz C300. The contact stated while driving at an unknown speed, there was a burning odor inside the vehicle. The contact stated the passenger side air bags was enable…
FUEL/PROPULSION SYSTEM
2 complaint(s)
While driving car on Sunday 10/5, it suddenly failed to respond to gas pedal pressure. The car stopped accelerating and rather slowed to 15 MPH, almost causing a car from behind to hit me in the rear…
POWER TRAIN
2 complaint(s)
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
1 complaint(s)
Rearview camera not displaying any image when transmission is put in reverse.
ELECTRICAL SYSTEM
1 complaint(s)
FUEL SYSTEM, GASOLINE
1 complaint(s)
The contact owns a 2021 Mercedes Benz C. The contact stated that while driving on the highway, the vehicle began to lose power, riding rough. The check engine light illuminated. The vehicle was tow…
SEAT BELTS
1 complaint(s)
Both driver and passenger seatbelts do not fully retract and remain loose. Must be manually guided back into mechanism. I see that there has been a recall for the cabriolet version of this vehicle pla…
SUSPENSION
1 complaint(s)
TIRES
1 complaint(s)
The contact owns a 2021 Mercedes-Benz C43 AMG equipped with Continental Tires, Tire Line: Sport Contact, Tire Size: 225/40/R19, DOT Number: LMJAD5UR (Front Tires) and Pirelli Tires, Tire Line: P Zero,…

The 10 components named in the most complaints are shown, of 11 named in all.

Data sources