2021 Mercedes-Benz GLS 2.9 GLS400d AMG Line Premium
Version: 2.9 GLS400d AMG Line Premium G-Tronic 4WD Euro 6 (s/s) 5dr (325 bhp)
Price: £45,995. Fair price: £564 (1%) under the AskCar estimate of £46,559, our expected asking price for this car from its model, age, mileage and specification, drawing on 132 priced Mercedes-Benz GLS adverts on AskCar as of 31 October 2026.
AskCar lists 138 used Mercedes-Benz GLS from 109 UK dealerships, as of 31 October 2026.
Overview
- Make
- Mercedes-Benz
- Model
- GLS
- Trim
- AMG Line Premium
- Version
- 2.9 GLS400d AMG Line Premium G-Tronic 4WD Euro 6 (s/s) 5dr (325 bhp)
- Mileage
- 59,002 miles
- Year
- 2021
- Fuel type
- Diesel
- Body type
- SUV
- Engine
- 2.9 L
- Gearbox
- Automatic
- Power
- 325 bhp
- Seats
- 7
- CO2
- 231 g/km
- Colour
- Black
- Doors
- 5
- Driven wheels
- Four Wheel Drive
- Gearbox version
- G-Tronic
- Engine badge
- GLS400d
- Emissions standard
- Euro 6
About this car
This 2021 Mercedes-Benz GLS AMG Line Premium is advertised with 59,002 miles on the clock. Priced at £45,995, it is advertised £564 below the AskCar estimate of £46,559. To work out the AskCar estimate, we analyse UK dealer adverts for 132 Mercedes-Benz GLS cars across different ages and specifications. We have tracked this advert today. Its recorded MOT is valid until 6 January 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is Agnew Group Mercedes-Benz Of Belfast, based in Belfast.
Stock data as of 31 October 2026.
Price history
AskCar first saw this advert on 31 October 2026.
| Date observed | Asking price |
|---|---|
| 31 October 2026 | £45,995 |
Price and mileage comparison
Fair price: £564 (1%) under the AskCar estimate of £46,559.
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 132 priced Mercedes-Benz GLS adverts across different ages and specifications, as of 31 October 2026.
The advertised mileage is consistent with the last MOT reading.
MOT
MOT: valid until 6 January 2027. 25,798 miles at the last test.
2021 Mercedes-Benz GLS price guide
More like this
Photos
49 photos of this car are on its AskCar page.
How to contact the dealer and its opening hours are on this AskCar page.
As of 31 October 2026, AskCar lists 583,548 cars and vans from 12,716 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.