2018 Audi A4 2.0 TDI S Line

Overview

• Make: Audi
• Model: A4
• Trim: S Line
• Version: 2.0 TDI S Line S tronic FWD Euro 6 (s/s) 4dr (148 bhp)
• Year: 2018
• Mileage: 83,000 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 148 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 109 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Audi A4 S Line has covered 83,000 miles, around 8,000 more miles than is typical for its age. The dealer is asking £12,995, which is £1,150 above the AskCar estimate of £11,845. 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 108 days. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Cars of Conwy, based in Conwy. 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

Above the going rate: £1,150 (9%) over the AskCar estimate of £11,845.

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 108 days. 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 17 July 2026 at £12,995. 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 22 November 2026.

It failed its MOT on 28 October 2025 (engine MIL inoperative or indicates a malfunction) and passed later the same day.

Advisories at the latest test: front tyres earing on inner edges.

Mileage at that test: 80,715 miles, which matches the advertised 83,000 miles.

Advertised mileage is about 8,000 miles higher 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, 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
• 2018 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 91,400 miles. Price: £11,500, £1,495 less than this car. Dealer: Freeman Motors in Oldham. AskCar page: https://askcar.co.uk/car/audi-a4-2018-9dff009210b5
• 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