2021 Mercedes-Benz C Class prices

This 2021 Mercedes-Benz C Class is no longer listed. Here are similar cars for sale now.

There are 139 used 2021 Mercedes-Benz C Class cars for sale from UK dealers on AskCar, as of 8 November 2026. Typical asking price £19,700 (the median: half cost less, half cost more). The cheapest is £12,990. The middle half are priced between £18,000 and £24,000. Median mileage: about 45,000 miles.

Dealers lowered the asking price on more than a third of 2021 Mercedes-Benz C Class cars: 63 of the 139 in the 14 days to 8 November 2026.

2021 Mercedes-Benz C Class prices by engine and mileage

A 2021 Mercedes-Benz C Class 2.0 diesel car typically costs £19,000, against £19,000 for the 1.5 petrol, as of 8 November 2026.

A 2021 Mercedes-Benz C Class 2.0 diesel car with 40,000 to 60,000 miles typically costs £19,000, against £16,000 with 60,000 miles or more.

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
2.0 diesel£19,000Too few for saleToo few for sale£19,000£16,000
1.5 petrol£19,000Too few for saleToo few for saleToo few for saleToo few for sale

Only 14 of the 2021 Mercedes-Benz C Class cars for sale have the 3.0 petrol engine, too few to give a typical asking price.

Only 8 of the 2021 Mercedes-Benz C Class cars for sale have the 4.0 petrol engine, too few to give a typical asking price.

Only 4 of the 2021 Mercedes-Benz C Class cars for sale have the 1.9 diesel engine, too few to give a typical asking price.

2021 Mercedes-Benz C Class prices by trim

TrimTypical asking price, 2021 cars
AMG Line Edition£18,500
AMG Line Night Edition Premium Plus£20,000
AMG Line Night Edition PremiumToo few for sale
AMG LineToo few for sale
AMG Line Edition PremiumToo few for sale
AMG Line PremiumToo few for sale
Premium PlusToo few for sale
AMG Night Edition Premium PlusToo few for sale
AMG Line Premium PlusToo few for sale
SportToo few for sale
AMGToo few for sale
SEToo few for sale
PremiumToo few for sale
AMG PremiumToo few for sale

Only 19 of the 2021 Mercedes-Benz C Class cars for sale are AMG Line Night Edition Premium, too few to give a typical asking price.

Only 13 of the 2021 Mercedes-Benz C Class cars for sale are AMG Line, too few to give a typical asking price.

Only 10 of the 2021 Mercedes-Benz C Class cars for sale are AMG Line Edition Premium, too few to give a typical asking price.

Only 7 of the 2021 Mercedes-Benz C Class cars for sale are AMG Line Premium, too few to give a typical asking price.

Only 6 of the 2021 Mercedes-Benz C Class cars for sale are Premium Plus, too few to give a typical asking price.

Only 4 of the 2021 Mercedes-Benz C Class cars for sale are AMG Night Edition Premium Plus, too few to give a typical asking price.

Only 3 of the 2021 Mercedes-Benz C Class cars for sale are AMG Line Premium Plus, too few to give a typical asking price.

Only 2 of the 2021 Mercedes-Benz C Class cars for sale are Sport, too few to give a typical asking price.

Only 2 of the 2021 Mercedes-Benz C Class cars for sale are AMG, too few to give a typical asking price.

Only 1 of the 2021 Mercedes-Benz C Class cars for sale are SE, too few to give a typical asking price.

Only 1 of the 2021 Mercedes-Benz C Class cars for sale are Premium, too few to give a typical asking price.

Only 1 of the 2021 Mercedes-Benz C Class cars for sale are AMG Premium, too few to give a typical asking price.

Typical asking prices are of 2021 Mercedes-Benz C Class cars for sale on 8 November 2026, and are given only where at least 20 cars with a price are for sale.

2021 Mercedes-Benz C Class against other years

A 2020 Mercedes-Benz C Class car has a typical asking price of £18,200 and a 2022 one £25,000, as of 8 November 2026.

AskCar lists 4,861 used Mercedes-Benz C Class across the UK, from 2,336 dealerships.

As of 8 November 2026, AskCar lists 595,762 cars and vans from 12,892 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2021 Mercedes-Benz C Class cars for sale now, page 1 of 3

This page picks out up to 10 cars in each of these groups: best value, cheapest, lowest mileage, recently reduced and newly advertised. A car in more than one group is listed in full once. The groups pick only from cars with photos and an AskCar estimate, priced at £500 or more and no more than 25% under that estimate. 134 of the 136 cars listed here meet these rules. Pages 2 to 3 list every other 2021 Mercedes-Benz C Class car, cheapest first, including the 2 the groups do not pick from.

The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 4,562 priced Mercedes-Benz C Class adverts on AskCar as of 8 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2021 Mercedes-Benz C Class.

Each car: year, make, model, engine and trim, power, gearbox, fuel, body, doors, colour; mileage; price and its changes; how the price compares with the AskCar estimate; emissions standard and ULEZ compliance where it holds; MOT; dealer and town; AskCar page. Each car's AskCar page has its full price history and cheaper cars like it.

This list leaves out 3 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

Best value 2021 Mercedes-Benz C Class: priced furthest below the AskCar estimate

These 10 are priced 11% to 21% under their AskCar estimate. Their asking prices run from £12,990 to £27,495.

Cheapest 2021 Mercedes-Benz C Class: the lowest asking prices

These 10 are priced £12,990 to £14,999. They have covered 58,000 to 96,000 miles.

Lowest-mileage 2021 Mercedes-Benz C Class

These 10 have covered 68 to 18,100 miles. Their asking prices run from £21,699 to £80,000.

Recently reduced 2021 Mercedes-Benz C Class: the biggest price reductions in the 14 days to 8 November 2026

The dealer lowered the asking price on each of these 10 in the 14 days to 8 November 2026. Their reductions since AskCar first saw them run from £2,000 to £5,005.

Newly advertised 2021 Mercedes-Benz C Class: first seen by AskCar in the 7 days to 8 November 2026

These 10 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

Mercedes-Benz C Class by gearbox, fuel and body

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2021 Mercedes-Benz C Class by trim

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