2021 Mercedes-Benz GLC prices

There are 148 used 2021 Mercedes-Benz GLC cars for sale from UK dealers on AskCar, as of 10 November 2026. Typical asking price £25,500 (the median: half cost less, half cost more). The cheapest is £17,890. The middle half are priced between £23,000 and £29,000. Median mileage: about 49,000 miles.

Dealers lowered the asking price on more than a third of 2021 Mercedes-Benz GLC cars: 62 of the 148 in the 14 days to 10 November 2026.

2021 Mercedes-Benz GLC prices by engine and mileage

A 2021 Mercedes-Benz GLC 2.0 diesel car with 20,000 to 40,000 miles typically costs £27,500, against £21,000 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£25,000Too few for sale£27,500£25,000£21,000

Only 13 of the 2021 Mercedes-Benz GLC cars for sale have the 3.0 petrol engine, too few to give a typical asking price.

Only 7 of the 2021 Mercedes-Benz GLC cars for sale have the 4.0 petrol engine, too few to give a typical asking price.

Only 3 of the 2021 Mercedes-Benz GLC cars for sale have the 1.9 plug-in hybrid engine, too few to give a typical asking price.

2021 Mercedes-Benz GLC prices by trim

TrimTypical asking price, 2021 cars
AMG Line Premium£25,500
AMG Line£23,500
AMG Line Premium Plus£27,500
AMG Premium PlusToo few for sale
SportToo few for sale
Premium PlusToo few for sale
AMG PremiumToo few for sale

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

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

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

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

Typical asking prices are of 2021 Mercedes-Benz GLC cars for sale on 10 November 2026, and are given only where at least 20 cars with a price are for sale.

2021 Mercedes-Benz GLC against other years

A 2020 Mercedes-Benz GLC car has a typical asking price of £22,500 and a 2022 one £27,500, as of 10 November 2026.

AskCar lists 2,886 used Mercedes-Benz GLC across the UK, from 1,190 dealerships.

As of 10 November 2026, AskCar lists 591,054 cars and vans from 12,888 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2021 Mercedes-Benz GLC 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. 133 of the 140 cars listed here meet these rules. Pages 2 to 3 list every other 2021 Mercedes-Benz GLC car, cheapest first, including the 7 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 2,852 priced Mercedes-Benz GLC adverts on AskCar as of 10 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2021 Mercedes-Benz GLC.

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 8 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

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

These 10 are priced 9% to 20% under their AskCar estimate. Their asking prices run from £18,975 to £23,800.

Cheapest 2021 Mercedes-Benz GLC: the lowest asking prices

These 10 are priced £18,490 to £19,995. They have covered 65,100 to 107,350 miles.

Lowest-mileage 2021 Mercedes-Benz GLC

These 10 have covered 18,000 to 25,871 miles. Their asking prices run from £26,998 to £65,995.

Recently reduced 2021 Mercedes-Benz GLC: the biggest price reductions in the 14 days to 10 November 2026

The dealer lowered the asking price on each of these 10 in the 14 days to 10 November 2026. Their reductions since AskCar first saw them run from £2,900 to £6,000.

Newly advertised 2021 Mercedes-Benz GLC: first seen by AskCar in the 7 days to 10 November 2026

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

Mercedes-Benz GLC by gearbox, fuel and body

Mercedes-Benz GLC prices by year

Mercedes-Benz GLC by trim

2021 Mercedes-Benz GLC by price

2021 Mercedes-Benz GLC by trim

Mercedes-Benz GLC by price

Mercedes-Benz GLC near you

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