Used diesel Mercedes-Benz GLA for sale under £20,000

There are 718 used diesel Mercedes-Benz GLA under £20,000 for sale from UK dealers on AskCar, as of 29 October 2026. Typical asking price £10,500 (the median: half cost less, half cost more). The cheapest is £1,995. AskCar lists 2,541 used Mercedes-Benz GLA across the UK, from 1,313 dealerships.

The middle half of the 718 cars are priced between £9,000 and £12,500.

As of 29 October 2026, AskCar lists 587,923 cars and vans from 12,992 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

217 of the 718 cars had their price reduced in the last 14 days to 29 October 2026.

Median asking price by year

YearFor sale with a priceMedian asking priceMiddle half priced between
202148£19,000£18,100 to £19,700
2018145£12,000£10,700 to £13,300
2017198£11,000£9,500 to £12,200
2016137£9,500£8,500 to £11,000
2015119£9,000£8,000 to £10,000
201445£8,800£8,000 to £9,500

Cars for sale now, page 1 of 8

Best value first: the cars priced furthest below their AskCar estimate come first, and those without one come after. The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 2,501 priced Mercedes-Benz GLA adverts on AskCar as of 29 October 2026.

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.

Cheaper cars like each one, with its price history, are on its AskCar page.

Mercedes-Benz GLA by gearbox, fuel and body

Diesel Mercedes-Benz GLA by price

Mercedes-Benz GLA prices by year

Mercedes-Benz GLA by price

Diesel cars and vans under £20,000

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