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

There are 2,090 used diesel Mercedes-Benz C Class under £20,000 for sale from UK dealers on AskCar, as of 30 October 2026. Typical asking price £12,000 (the median: half cost less, half cost more). The cheapest is £990. AskCar lists 4,734 used Mercedes-Benz C Class across the UK, from 2,267 dealerships.

The middle half of the 2,090 cars are priced between £8,000 and £15,000.

As of 30 October 2026, AskCar lists 580,490 cars and vans from 12,695 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

544 of the 2,090 cars had their price reduced in the last 14 days to 30 October 2026.

Median asking price by year

YearFor sale with a priceMedian asking priceMiddle half priced between
202133£18,100£16,500 to £19,000
2020116£17,000£15,400 to £18,500
2019272£15,500£13,300 to £17,000
2018280£14,000£12,000 to £16,000
2017402£13,000£11,300 to £15,000
2016278£11,500£9,700 to £13,500
2015223£8,500£7,000 to £10,000
2014177£8,000£6,000 to £9,400
201378£5,200£4,500 to £6,200
201289£4,900£4,000 to £5,500
201143£4,300£3,600 to £4,600
201023£3,300£2,800 to £4,200
200923£3,500£2,900 to £4,000

Cars for sale now, page 7 of 21

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 4,537 priced Mercedes-Benz C Class adverts on AskCar as of 30 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.

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