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: 56,707 miles
• Fuel: Diesel
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 124 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Audi A6 Avant S Line has covered 56,707 miles, around 26,200 fewer miles than is typical for its age. The AskCar estimate for this car is £19,855. It is priced at £18,250, which is £1,605 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. We have tracked this advert for 3 days. Its advertised mileage matches the government's MOT record. It is for sale at Car Planet Barnet in New Southgate. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Good value: £1,605 (8%) under the AskCar estimate of £19,855.

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

AskCar first saw this 2018 Audi A6 Avant advertised 3 days ago. About half of 2018 Audi A6 Avant cars are gone from sale within a month of being advertised: 29 of the 58 first advertised between 13 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 30 October 2026 at £18,250. 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 27 December 2026.

It has had 6 MOTs. The latest, on 19 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 48,509 miles, which matches the advertised 56,707 miles.

Advertised mileage is about 26,200 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 2 November 2026.

The 3 closest to this car in mileage:

• 2018 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 57,241 miles. Price: £17,999, £251 less than this car. Dealer: GH Car Sales in Morpeth. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-00aad5f77efa
• 2018 Audi A6 Avant S Line, 2.0 diesel estate, black. Mileage: 57,753 miles. Price: £16,299, £1,951 less than this car. Dealer: Pinetree Car Superstore - Tonypandy in Tonypandy. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-53f1531a325c
• 2018 Audi A6 Avant S Line, 2.0 diesel estate, blue. Mileage: 67,000 miles. Price: £14,990, £3,260 less than this car. Dealer: Six Ways Car Sales in Swansea. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-1fe7a9610350

• The nearest: 2018 Audi A6 Avant S Line, 2.0 diesel estate, white, 11 miles from this car. Mileage: 77,000 miles. Price: £16,995, £1,255 less than this car. Dealer: Precision Wheels in Harlow. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-36e3d5251798