2018 Audi A4 2.0 TDI S Line

Overview

• Make: Audi
• Model: A4
• Trim: S Line
• Version: 2.0 TDI 40 S Line S tronic FWD Euro 6 (s/s) 4dr (187 bhp)
• Year: 2018
• Mileage: 68,830 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 187 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 120 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 68,830 miles, this 2018 Audi A4 S Line has covered about 6,200 fewer miles than other 2018 Audi A4 cars. Priced at £12,995, it is advertised £172 above the AskCar estimate of £12,823. To work out the AskCar estimate, we analyse UK dealer adverts for 1,428 Audi A4 cars across different ages and specifications. The dealer may accept less. This car has been on sale for at least 152 days, and its asking price is down £1,400. The government's MOT record matches its advertised mileage. You can find this car at Saline Motors in Comrie. 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

Fair price: £172 (1%) over the AskCar estimate of £12,823.

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 1,428 priced Audi A4 adverts across different ages and specifications, as of 2 November 2026.

A 2018 Audi A4 with the 2.0 diesel engine is typically advertised at £12,200: the median of the 48 for sale on AskCar, as of 2 November 2026.

Time on sale

The dealer may accept less. This 2018 Audi A4 has been on sale for at least 152 days, and its asking price has been cut by £1,400. About half of 2018 Audi A4 cars are gone from sale within a month of being advertised: 73 of the 145 first advertised between 11 July 2026 and 29 September 2026.

Price history

AskCar first saw this advert on 3 June 2026 at £14,395. Its asking price is now £12,995, £1,400 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 4 June 2026: £14,395
• 23 July 2026: £13,895
• 5 August 2026: £13,495
• 29 October 2026: £12,995

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 5 December 2026.

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

Advisories at the latest test: rear registration plate deteriorated but not likely to be misread; front tyre worn close to legal limit/worn on edge both front tyre's.

Mileage at that test: 64,305 miles, which matches the advertised 68,830 miles.

Advertised mileage is about 6,200 miles lower than the median mileage of a 2018 Audi A4 on AskCar.

Similar cars

6 other 2018 Audi A4 S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £8,975 to £16,990, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2018 Audi A4 S Line, 2.0 diesel saloon, white. Mileage: 74,552 miles. Price: £12,800, £195 less than this car. Dealer: Marshall BMW Scunthorpe in Scunthorpe. AskCar page: https://askcar.co.uk/car/audi-a4-2018-e204df0cd915
• 2018 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 83,000 miles. Price: £12,995, the same price as this car. Dealer: Cars of Conwy in Colwyn Bay. AskCar page: https://askcar.co.uk/car/audi-a4-2018-af10c433b511
• 2018 Audi A4 S Line, 2.0 diesel saloon, silver. Mileage: 86,504 miles. Price: £12,950, the same price as this car. Dealer: Campbell Trade Sales in Armagh. AskCar page: https://askcar.co.uk/car/audi-a4-2018-e865bfbf0117