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

There are 1,054 used petrol Mercedes-Benz C Class under £20,000 for sale from UK dealers on AskCar, as of 29 October 2026. Typical asking price £13,300 (the median: half cost less, half cost more). The cheapest is £690. AskCar lists 4,876 used Mercedes-Benz C Class across the UK, from 2,356 dealerships.

The middle half of the 1,054 cars are priced between £9,000 and £16,200.

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.

265 of the 1,054 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
202050£16,000£14,100 to £17,900
2019224£15,000£13,300 to £17,000
2018163£14,500£12,700 to £16,700
2017133£13,700£11,500 to £16,000
201688£13,500£12,000 to £16,000
201578£10,000£8,500 to £11,800
201434£9,400£7,600 to £11,000
201339£7,000£5,600 to £16,000
201245£5,600£4,600 to £8,000
201124£6,000£4,700 to £9,900
201028£4,600£3,500 to £6,200
200927£4,000£2,700 to £5,700
200820£4,000£3,400 to £7,600

Cars for sale now, page 3 of 11

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 4,525 priced Mercedes-Benz C Class 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.

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Mercedes-Benz C Class by gearbox, fuel and body

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