2018 Audi A6 Avant 3.0 S Line

Overview

• Make: Audi
• Model: A6 Avant
• Trim: S Line
• Version: 3.0 S Line Auto 4WD Euro 6 5dr
• Year: 2018
• Mileage: 62,000 miles
• Fuel: Diesel
• Body: Estate, 5 doors, 5 seats
• Engine: 3.0 litres
• Gearbox: Automatic
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 155 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 62,000 miles on the clock, this 2018 Audi A6 Avant S Line has done roughly 21,700 fewer miles than a typical 2018 Audi A6 Avant. The AskCar estimate for this car is £20,481. It is priced at £23,490, which is £3,009 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 783 Audi A6 Avant cars across different ages and specifications. We have tracked this advert for 162 days. Our latest MOT record expired on 26 October 2026. Check the current position with the dealer. We checked its advertised mileage against the government's MOT record, and they match. You can find this car at Cheshire Performance in Audenshaw. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Above the going rate: £3,009 (14%) over the AskCar estimate of £20,481.

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 783 priced Audi A6 Avant adverts across different ages and specifications, as of 6 November 2026.

A 2018 Audi A6 Avant with the 3.0 diesel engine is typically advertised at £18,600: the median of the 11 for sale on AskCar, as of 6 November 2026.

Time on sale

This 2018 Audi A6 Avant has been on sale for at least 162 days.

Price history

AskCar first saw this advert on 28 May 2026 at £23,290. Its asking price is now £23,490, £200 more.

Price changes recorded:

• 29 May 2026: £23,290
• 7 August 2026: £22,490
• 11 August 2026: £21,990
• 26 August 2026: £23,990
• 30 October 2026: £23,490

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 6 November 2026: the latest record we hold ran out on 26 October 2026; ask the dealer for the current MOT.

It has had 5 MOTs. The latest, on 22 October 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 60,985 miles, which matches the advertised 62,000 miles.

Advertised mileage is about 21,700 miles lower than the median mileage of a 2018 Audi A6 Avant on AskCar.

Similar cars

5 other 2018 Audi A6 Avant S Line 3.0 diesel automatic estates are for sale at UK dealers, from £13,625 to £20,700, as of 6 November 2026.

The 3 closest to this car in mileage:

• 2018 Audi A6 Avant S Line, 3.0 diesel estate, blue. Mileage: 58,050 miles. Price: £20,700, £2,790 less than this car. Dealer: Car Planet Watford in Watford. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-ee3a3c1edb9e
• 2018 Audi A6 Avant S Line, 3.0 diesel estate, black. Mileage: 87,865 miles. Price: £16,995, £6,495 less than this car. Dealer: Sherwood Car Centre in Nottingham. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-ed774443d6af
• 2018 Audi A6 Avant S Line, 3.0 diesel estate, black. Mileage: 96,000 miles. Price: £18,890, £4,600 less than this car. Dealer: BM Vehicles in Ware. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2018-2b14c053512d