2018 Audi A4 2.0 TDI S Line
Price: £16,990. Fair price: £279 (1%) under the AskCar estimate of £17,269, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,427 priced Audi A4 adverts on AskCar as of 4 November 2026.
AskCar lists 1,488 used Audi A4 from 972 UK dealerships, as of 4 November 2026.
Overview
- Make: Audi
- Model: A4
- Trim: S Line
- Version: 2.0 TDI 40 S Line S tronic 4WD Euro 6 (s/s) 4dr (187 bhp)
- Year: 2018
- Mileage: 26,000 miles
- Fuel: Diesel
- Body: Saloon, 4 doors, 5 seats
- Engine: 2.0 litres, 187 bhp
- Gearbox: Automatic (S tronic)
- Drive: Four-wheel drive
- Colour: Red
- CO2: 138 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2018 Audi A4 S Line has covered 26,000 miles, around 47,900 fewer miles than is typical for its age. Priced at £16,990, it is advertised £279 below the AskCar estimate of £17,269. The AskCar estimate uses 1,427 UK dealer adverts for the Audi A4, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert for 26 days. The government's MOT record matches its advertised mileage. You can find this car at Stratus in Hook. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 4 November 2026.
Price
Fair price: £279 (1%) under the AskCar estimate of £17,269.
The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.
It draws on 1,427 priced Audi A4 adverts across different ages and specifications, as of 4 November 2026.
A 2018 Audi A4 with the 2.0 diesel engine is typically advertised at £12,600: the median of the 46 for sale on AskCar, as of 4 November 2026.
Time on sale
This 2018 Audi A4 has been on sale for at least 26 days.
Price history
AskCar first saw this advert on 9 October 2026 at £16,990. Its asking price has not changed.
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 7 December 2026.
It has had 6 MOTs. The latest, on 8 December 2025, passed.
Advisories at the latest test: nearside front tyre slightly damaged/cracking or perishing cracking; offside front tyre slightly damaged/cracking or perishing cracking; offside rear tyre slightly damaged/cracking or perishing cracking.
Mileage at that test: 25,562 miles, which matches the advertised 26,000 miles.
Advertised mileage is about 47,900 miles lower than the median mileage of a 2018 Audi A4 on AskCar.
Similar cars
5 other 2018 Audi A4 S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £11,500 to £12,995, as of 4 November 2026.
The 3 closest to this car in mileage:
- 2018 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 68,830 miles. Price: £12,995, £3,995 less than this car. Dealer: Saline Motors in Dunfermline. AskCar page: https://askcar.co.uk/car/audi-a4-2018-eb54952af002
- 2018 Audi A4 S Line, 2.0 diesel saloon, white. Mileage: 74,552 miles. Price: £12,800, £4,190 less than this car. Dealer: Marshall BMW Scunthorpe in Scunthorpe. AskCar page: https://askcar.co.uk/car/audi-a4-2018-e204df0cd915
- 2018 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 83,000 miles. Price: £12,995, £3,995 less than this car. Dealer: Cars of Conwy in Colwyn Bay. AskCar page: https://askcar.co.uk/car/audi-a4-2018-af10c433b511
Browse all Audi A4 cars for sale · 2018 Audi A4 price guide
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Photos
83 photos of this car are on its AskCar page.
As of 4 November 2026, AskCar lists 592,552 cars and vans from 12,964 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.