2018 Audi A6 Avant 2.0 TDI ultra S Line
Price: £9,950. Fair price: £514 (4%) under the AskCar estimate of £10,464, our expected asking price for this car from its model, age, mileage and specification, drawing on 778 priced Audi A6 Avant adverts on AskCar as of 2 November 2026.
AskCar lists 793 used Audi A6 Avant from 580 UK dealerships, as of 2 November 2026.
Overview
- Make: Audi
- Model: A6 Avant
- Trim: S Line
- Version: 2.0 TDI ultra S Line S tronic FWD Euro 6 (s/s) 5dr (187 bhp)
- Year: 2018
- Mileage: 124,000 miles
- Fuel: Diesel
- Body: Estate, 5 doors, 5 seats
- Engine: 2.0 litres, 187 bhp
- Gearbox: Automatic (S tronic)
- Drive: Front-wheel drive
- Colour: Grey
- CO2: 115 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2018 Audi A6 Avant S Line is advertised with 124,000 miles, approximately 41,100 above the typical mileage for its age. The AskCar estimate for this car is £10,464. It is priced at £9,950, which is £514 below that estimate. The AskCar estimate uses 778 UK dealer adverts for the Audi A6 Avant, with adjustments for age, mileage, trim, engine and other specifications. It first appeared in our advert records 24 days ago. Its advertised mileage matches the government's MOT record. The seller is Windmill Motors, based in Bourne. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 2 November 2026.
Price
Fair price: £514 (4%) under the AskCar estimate of £10,464.
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 778 priced Audi A6 Avant adverts across different ages and specifications, as of 2 November 2026.
A 2018 Audi A6 Avant with the 2.0 diesel engine is typically advertised at £14,700: the median of the 50 for sale on AskCar, as of 2 November 2026.
Time on sale
This 2018 Audi A6 Avant has been on sale for at least 24 days.
Price history
AskCar first saw this advert on 9 October 2026 at £9,950. 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 2 November 2026: valid until 22 January 2027.
It has had 6 MOTs. The latest, on 14 January 2026, passed.
There were no advisories at the latest test.
Mileage at that test: 112,043 miles, which matches the advertised 124,000 miles.
Advertised mileage is about 41,100 miles higher than the median mileage of a 2018 Audi A6 Avant on AskCar.
Similar cars
14 other 2018 Audi A6 Avant S Line 2.0 diesel automatic estates are for sale at UK dealers, from £10,495 to £20,299, as of 2 November 2026.
The 3 closest to this car in mileage:
- 2018 Audi A6 Avant S Line, 2.0 diesel estate, white. Mileage: 121,177 miles. Price: £13,995, £4,045 more than this car. Dealer: Blackline Motors in Oldham. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-41093fc03c2b
- 2018 Audi A6 Avant S Line, 2.0 diesel estate, red. Mileage: 118,600 miles. Price: £13,749, £3,799 more than this car. Dealer: Noya Motor Group in Peterborough. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-dcae342b9bab
- 2018 Audi A6 Avant S Line, 2.0 diesel estate, black. Mileage: 135,961 miles. Price: £13,995, £4,045 more than this car. Dealer: Motorport in Bedford. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-f99a1b062ea8
Browse all Audi A6 Avant cars for sale · 2018 Audi A6 Avant price guide
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- Used Audi A6 Avant S Line prices
- Used Audi A6 Avant for sale under £10,000
- Used diesel Audi A6 Avant for sale
Photos
46 photos of this car are on its AskCar page.
As of 2 November 2026, AskCar lists 586,270 cars and vans from 12,920 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.