2018 Audi A6 Avant 2.0 TDI S Line

Overview

• Make: Audi
• Model: A6 Avant
• Trim: S Line
• Version: 2.0 TDI 40 S Line S tronic FWD Euro 6 (s/s) 5dr (201 bhp)
• Year: 2018
• Mileage: 77,000 miles
• Fuel: Diesel
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: White
• CO2: 124 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Audi A6 Avant S Line has covered 77,000 miles. Priced at £16,995, it is advertised £32 below the AskCar estimate of £17,027. The AskCar estimate uses UK dealer asking prices, including 785 Audi A6 Avant adverts, and accounts for the car’s age, mileage and specification. We first saw this car advertised 57 days ago. Its asking price has since fallen by £1,000. The last MOT shows 77,624 miles, more than the advert. This is worth checking with the dealer. The latest recorded MOT expires on 3 September 2027. It is advertised by Precision Wheels in Harlow. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £32 (under 1%) under the AskCar estimate of £17,027.

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 785 priced Audi A6 Avant adverts across different ages and specifications, as of 5 November 2026.

A 2018 Audi A6 Avant with the 2.0 diesel engine is typically advertised at £14,600: the median of the 48 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2018 Audi A6 Avant has been on sale for at least 57 days.

Price history

AskCar first saw this advert on 9 September 2026 at £17,995. Its asking price is now £16,995, £1,000 less. The latest price cut was seen on 12 October 2026.

Price changes recorded:

• 9 September 2026: £17,995
• 24 September 2026: £17,495
• 6 October 2026: £17,295
• 12 October 2026: £16,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 3 September 2027.

It has had 7 MOTs. The latest, on 4 September 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 77,624 miles. The advert says 77,000 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 6,300 miles lower 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 £9,950 to £20,299, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2018 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 72,748 miles. Price: £15,990, £1,005 less than this car. Dealer: Brownroyd Motors in Heywood. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-c16c20409f0c
• 2018 Audi A6 Avant S Line, 2.0 diesel estate, blue. Mileage: 67,000 miles. Price: £14,990, £2,005 less than this car. Dealer: Six Ways Car Sales in Swansea. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-1fe7a9610350
• 2018 Audi A6 Avant S Line, 2.0 diesel estate, black. Mileage: 67,000 miles. Price: £17,995, £1,000 more than this car. Dealer: S.P.V. Automotive in Windlesham. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-0a5895aa721f

• The nearest: 2018 Audi A6 Avant S Line, 2.0 diesel estate, blue, 11 miles from this car. Mileage: 56,707 miles. Price: £18,250, £1,255 more than this car. Dealer: Car Planet Barnet in Barnet. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-34fb5f039233