2021 Mercedes-Benz SL 3.0 SL400 V6 Grand Edition
Price: £44,999. Fair price: £1,986 (4%) under the AskCar estimate of £46,985, our expected asking price for this car from its model, age, mileage and specification, drawing on 371 priced Mercedes-Benz SL adverts on AskCar as of 7 November 2026.
AskCar lists 467 used Mercedes-Benz SL from 341 UK dealerships, as of 7 November 2026.
Overview
- Make: Mercedes-Benz
- Model: SL
- Trim: Grand Edition
- Version: 3.0 SL400 V6 Grand Edition G-Tronic+ RWD Euro 6 (s/s) 2dr (362 bhp)
- Year: 2021
- Mileage: 20,257 miles
- Fuel: Petrol
- Body: Convertible, 2 doors, 2 seats
- Engine: 3.0 litres, 362 bhp
- Gearbox: Automatic (G-Tronic+)
- Drive: Rear-wheel drive
- Colour: Grey
- CO2: 216 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
The advertised mileage for this 2021 Mercedes-Benz SL Grand Edition is 20,257 miles. Its asking price of £44,999 is £1,986 below the AskCar estimate of £46,985. The AskCar estimate draws on 371 Mercedes-Benz SL adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. It first appeared in our advert records 20 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Eastern Western Motor Group Mercedes-Benz of Edinburgh (Newbridge), based in Newbridge. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 7 November 2026.
Price
Fair price: £1,986 (4%) under the AskCar estimate of £46,985.
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 371 priced Mercedes-Benz SL adverts across different ages and specifications, as of 7 November 2026.
Time on sale
This 2021 Mercedes-Benz SL has been on sale for at least 20 days.
Price history
AskCar first saw this advert on 18 October 2026 at £44,999. 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 7 November 2026: valid until 16 September 2027.
It has had 5 MOTs. The latest, on 17 September 2026, passed.
There were no advisories at the latest test.
Mileage at that test: 20,227 miles, which matches the advertised 20,257 miles.
Browse all Mercedes-Benz SL cars for sale · 2021 Mercedes-Benz SL price guide
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Photos
39 photos of this car are on its AskCar page.
As of 7 November 2026, AskCar lists 601,018 cars and vans from 12,892 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.