2018 Audi A6 Saloon S Line prices

There are 48 used 2018 Audi A6 Saloon S Line cars for sale from UK dealers on AskCar, as of 9 November 2026. Typical asking price £16,000 (the median: half cost less, half cost more). The cheapest is £7,995. The middle half are priced between £13,500 and £17,100. Median mileage: about 66,000 miles.

Dealers lowered the asking price on more than a third of 2018 Audi A6 Saloon S Line cars: 17 of the 48 in the 14 days to 9 November 2026.

2018 Audi A6 Saloon S Line prices by engine and mileage

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
2.0 diesel£16,000Too few for saleToo few for saleToo few for saleToo few for sale

Only 12 of the 2018 Audi A6 Saloon S Line cars for sale have the 3.0 diesel engine, too few to give a typical asking price.

Only 3 of the 2018 Audi A6 Saloon S Line cars for sale have the 1.8 petrol engine, too few to give a typical asking price.

Typical asking prices are of 2018 Audi A6 Saloon S Line cars for sale on 9 November 2026, and are given only where at least 20 cars with a price are for sale.

2018 Audi A6 Saloon S Line against other years

A 2019 Audi A6 Saloon S Line car has a typical asking price of £17,000, as of 9 November 2026.

AskCar lists 891 used Audi A6 Saloon across the UK, from 649 dealerships.

As of 9 November 2026, AskCar lists 584,619 cars and vans from 12,676 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2018 Audi A6 Saloon S Line cars for sale now, page 1 of 2

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. All 46 cars listed here meet these rules. Page 2 lists every other 2018 Audi A6 Saloon S Line car, cheapest first.

The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 863 priced Audi A6 Saloon adverts on AskCar as of 9 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2018 Audi A6 Saloon S Line.

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

Best value 2018 Audi A6 Saloon S Line: priced furthest below the AskCar estimate

These 10 are priced 6% to 19% under their AskCar estimate. Their asking prices run from £7,995 to £17,995.

Cheapest 2018 Audi A6 Saloon S Line: the lowest asking prices

These 10 are priced £7,995 to £13,000. They have covered 67,704 to 180,000 miles.

Lowest-mileage 2018 Audi A6 Saloon S Line

These 10 have covered 24,000 to 49,019 miles. Their asking prices run from £15,950 to £22,700.

Recently reduced 2018 Audi A6 Saloon S Line: the biggest price reductions in the 14 days to 9 November 2026

The dealer lowered the asking price on each of these 10 in the 14 days to 9 November 2026. Their reductions since AskCar first saw them run from £500 to £4,000.

Newly advertised 2018 Audi A6 Saloon S Line: first seen by AskCar in the 7 days to 9 November 2026

These 6 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

Audi A6 Saloon by gearbox, fuel and body

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