2018 Audi A6 Avant 2.0 TDI S Line

Price: £12,990. Fair price: £870 (7%) over the AskCar estimate of £12,120, our expected asking price for this car from its model, age, mileage and specification, drawing on 772 priced Audi A6 Avant adverts on AskCar as of 14 November 2026.

AskCar lists 793 used Audi A6 Avant from 577 UK dealerships, as of 14 November 2026.

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: 126,000 miles
Fuel: Diesel
Body: Estate, 5 doors, 5 seats
Engine: 2.0 litres, 201 bhp
Gearbox: Automatic (S tronic)
Drive: Front-wheel drive
Colour: Grey
CO2: 124 g/km
Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Audi A6 Avant S Line has covered 126,000 miles, around 40,600 more miles than is typical for its age. Priced at £12,990, it is advertised £870 above the AskCar estimate of £12,120. The AskCar estimate uses 772 UK dealer adverts for the Audi A6 Avant, with adjustments for age, mileage, trim, engine and other specifications. We first recorded this car for sale today. The government's MOT record matches its advertised mileage. It is for sale at Mawsley Motor Company in Northampton. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 14 November 2026.

How we estimate prices and check cars

Mawsley Motor Company is rated 4.4 out of 5 on Google.

Price

Fair price: £870 (7%) over the AskCar estimate of £12,120.

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 772 priced Audi A6 Avant adverts across different ages and specifications, as of 14 November 2026.

A 2018 Audi A6 Avant with the 2.0 diesel engine is typically advertised at £14,000: the median of the 48 for sale on AskCar, as of 14 November 2026.

Time on sale

AskCar first saw this 2018 Audi A6 Avant advertised today. About half of 2018 Audi A6 Avant cars are gone from sale within a month of being advertised: 38 of the 76 first advertised between 15 July 2026 and 11 October 2026.

Price history

AskCar first saw this advert on 14 November 2026 at £12,990. 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 14 November 2026: valid until 11 September 2027.

It has had 6 MOTs. The latest, on 3 September 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 122,804 miles, which matches the advertised 126,000 miles.

Advertised mileage is about 40,600 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 £9,950 to £20,299, as of 14 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, £3,040 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, red. Mileage: 118,600 miles. Price: £13,279, £289 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, £1,005 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

Photos

3 photos of this car are on its AskCar page.

As of 14 November 2026, AskCar lists 600,711 cars and vans from 12,770 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.