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: 135,961 miles
• Fuel: Diesel
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 124 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Audi A6 Avant S Line has covered 135,961 miles, around 52,400 more miles than is typical for its age. Its asking price of £13,995 is £2,756 above the AskCar estimate of £11,239. To work out the AskCar estimate, we analyse UK dealer adverts for 774 Audi A6 Avant cars across different ages and specifications. The dealer may accept less. This car has been on sale for at least 160 days. The government's MOT record matches its advertised mileage. It is advertised by Motorport in Bedford. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Above the going rate: £2,756 (24%) over the AskCar estimate of £11,239.

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 774 priced Audi A6 Avant adverts across different ages and specifications, as of 4 November 2026.

A 2018 Audi A6 Avant with the 2.0 diesel engine is typically advertised at £14,700: the median of the 48 for sale on AskCar, as of 4 November 2026.

Time on sale

The dealer may accept less. This 2018 Audi A6 Avant has been on sale for at least 160 days. About half of 2018 Audi A6 Avant cars are gone from sale within a month of being advertised: 33 of the 64 first advertised between 13 July 2026 and 1 October 2026.

Price history

AskCar first saw this advert on 28 May 2026 at £13,990. Its asking price is now £13,995, £5 more.

Price changes recorded:

• 29 May 2026: £13,990
• 18 June 2026: £13,490
• 4 July 2026: £13,250
• 13 July 2026: £13,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 4 December 2026.

It has had 6 MOTs. The latest, on 5 December 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 134,513 miles, which matches the advertised 135,961 miles.

Advertised mileage is about 52,400 miles higher than the median mileage of a 2018 Audi A6 Avant on AskCar.

Similar cars

13 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 4 November 2026.

The 3 closest to this car in mileage:

• 2018 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 124,000 miles. Price: £9,950, £4,045 less than this car. Dealer: Windmill Motors in Bourne. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-7713e446c241
• 2018 Audi A6 Avant S Line, 2.0 diesel estate, white. Mileage: 121,177 miles. Price: £13,995, the same price as 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, £246 less than this car. Dealer: Noya Motor Group in Peterborough. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-dcae342b9bab