2021 Mercedes-Benz GLA prices

There are 197 used 2021 Mercedes-Benz GLA cars for sale from UK dealers on AskCar, as of 10 November 2026. Typical asking price £20,500 (the median: half cost less, half cost more). The cheapest is £11,494. The middle half are priced between £19,000 and £22,500. Median mileage: about 40,000 miles.

Dealers lowered the asking price on more than a third of 2021 Mercedes-Benz GLA cars: 80 of the 197 in the 14 days to 10 November 2026.

2021 Mercedes-Benz GLA prices by engine and mileage

A 2021 Mercedes-Benz GLA 1.3 petrol car typically costs £20,500, against £20,500 for the 2.0 diesel, as of 10 November 2026.

A 2021 Mercedes-Benz GLA 2.0 diesel car with 20,000 to 40,000 miles typically costs £22,000, against £20,000 with 40,000 to 60,000 miles.

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
2.0 diesel£20,500Too few for sale£22,000£20,000Too few for sale
1.3 petrol£20,500Too few for sale£21,500£19,700Too few for sale

Only 1 of the 2021 Mercedes-Benz GLA cars for sale have the 1.9 diesel engine, too few to give a typical asking price.

2021 Mercedes-Benz GLA prices by trim

TrimTypical asking price, 2021 cars
AMG Line Premium Plus£23,000
AMG Line Executive£19,400
AMG Line Premium£21,500
AMG Line£20,500
Exclusive EditionToo few for sale
Sport ExecutiveToo few for sale
SportToo few for sale
AMGToo few for sale

Only 17 of the 2021 Mercedes-Benz GLA cars for sale are Exclusive Edition, too few to give a typical asking price.

Only 16 of the 2021 Mercedes-Benz GLA cars for sale are Sport Executive, too few to give a typical asking price.

Only 8 of the 2021 Mercedes-Benz GLA cars for sale are Sport, too few to give a typical asking price.

Only 3 of the 2021 Mercedes-Benz GLA cars for sale are AMG, too few to give a typical asking price.

Typical asking prices are of 2021 Mercedes-Benz GLA 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 GLA against other years

A 2020 Mercedes-Benz GLA car has a typical asking price of £17,500 and a 2022 one £22,500, as of 10 November 2026.

AskCar lists 2,483 used Mercedes-Benz GLA across the UK, from 1,295 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 GLA cars for sale now, page 1 of 4

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. 187 of the 191 cars listed here meet these rules. Pages 2 to 4 list every other 2021 Mercedes-Benz GLA car, cheapest first, including the 4 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 2,442 priced Mercedes-Benz GLA 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 GLA.

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

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

These 10 are priced 6% to 20% under their AskCar estimate. Their asking prices run from £16,500 to £25,895.

Cheapest 2021 Mercedes-Benz GLA: the lowest asking prices

These 10 are priced £11,494 to £17,143. They have covered 37,614 to 175,430 miles.

Lowest-mileage 2021 Mercedes-Benz GLA

These 10 have covered 6,822 to 16,402 miles. Their asking prices run from £22,491 to £26,290.

Recently reduced 2021 Mercedes-Benz GLA: 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 £2,000 to £4,400.

Newly advertised 2021 Mercedes-Benz GLA: 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 GLA by gearbox, fuel and body

Mercedes-Benz GLA prices by year

Mercedes-Benz GLA by trim

2021 Mercedes-Benz GLA by price

2021 Mercedes-Benz GLA by trim

Mercedes-Benz GLA by price

Mercedes-Benz GLA near you

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