Mercedes-Benz GLS fuel economy (UK)
Official figures for the Mercedes-Benz GLS from the Vehicle Certification Agency's new car lists, 2016–2026: 47 versions after removing repeats between lists. Economy is in UK (imperial) mpg; electric versions show miles per kWh and range instead. In the most recent lists (2021–2026, WLTP) combined economy is 19.9–36.7 mpg.
This model has figures from two different official tests: NEDC (older lists) and WLTP. They are shown in separate tables and must not be compared with each other.
Figures by list
Ranges are only comparable within the same test. Plug-in hybrids are listed in the tables but left out of these ranges.
WLTP figures, VCA lists 2021–2026
WLTP is the official test for new cars from September 2017. Its figures are closer to real-world driving than the older NEDC figures.
| Version | Fuel | Combined | L/100 km | CO₂ g/km | In lists |
|---|---|---|---|---|---|
| GLS GLS 450 d 4MATIC · A9 · 2989 cc | Hybrid | 36.7 mpg | 7.7 | 201 | 2025–2026 |
| GLS GLS 450 d 4MATIC · A9 · 2989 cc | Hybrid | 35.8 mpg | 7.9 | 206 | 2026 |
| GLS GLS 450 d 4MATIC · A9 · 2989 cc | Hybrid | 33.2 mpg | 8.5 | 223 | 2026 |
| GLS GLS 450 d 4MATIC · A9 · 2989 cc | Hybrid | 32.5 mpg | 8.7 | 229 | 2025–2026 |
| GLS GLS 450 4MATIC · A9 · 2999 cc | Hybrid | 28.3 mpg | 10.0 | 227 | 2025–2026 |
| GLS GLS 450 4MATIC · A9 · 2999 cc | Hybrid | 25.7 mpg | 11.0 | 252 | 2025–2026 |
| GLS AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 21.2 mpg | 13.3 | 300 | 2025–2026 |
| GLS Maybach GLS 680 · A9 · 3982 cc | Hybrid | 21.2 mpg | 13.3 | 304 | 2026 |
| GLS AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 21.1 mpg | 13.4 | 305 | 2026 |
| GLS AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 20.9 mpg | 13.5 | 306 | 2025–2026 |
| GLS AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 20.6 mpg | 13.7 | 312 | 2026 |
| GLS Maybach GLS 600 · A9 · 3982 cc | Hybrid | 20.6 mpg | 13.7 | 310 | 2025–2026 |
| GLS Maybach GLS 680 · A9 · 3982 cc | Hybrid | 20.6 mpg | 13.7 | 312 | 2026 |
| GLS Maybach GLS 600 · A9 · 3982 cc | Hybrid | 20.2 mpg | 14.0 | 316 | 2025–2026 |
| GLS GLS 450 d 4MATIC · A9 · 2989 cc | Hybrid | 36.2 mpg | 7.8 | 204 | 2024 |
| GLS GLS 450 d 4MATIC · A9 · 2989 cc | Hybrid | 31.0 mpg | 9.1 | 238 | 2024 |
| GLS GLS 450 4MATIC · A9 · 2999 cc | Hybrid | 28.5 mpg | 9.9 | 226 | 2024 |
| GLS GLS 450 4MATIC · A9 · 2999 cc | Hybrid | 25.5 mpg | 11.1 | 252 | 2024 |
| GLS Mercedes-AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 21.2 mpg | 13.3 | 300 | 2023–2024 |
| GLS Mercedes-AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 20.9 mpg | 13.5 | 306 | 2023–2024 |
| GLS Mercedes-Maybach GLS 600 · A9 · 3982 cc | Hybrid | 20.6 mpg | 13.7 | 310 | 2024 |
| GLS Mercedes-Maybach GLS 600 · A9 · 3982 cc | Hybrid | 20.2 mpg | 14.0 | 316 | 2024 |
| GLS GLS 400 d 4MATIC · A9 · 2925 cc | Diesel | 35.3 mpg | 8.0 | 210 | 2020–2023 |
| GLS GLS 400 d 4MATIC · A9 · 2925 cc | Diesel | 29.4 mpg | 9.6 | 252 | 2020–2023 |
| GLS GLS 450 d 4MATIC · A9 · 2989 cc | Hybrid | 35.3 mpg | 8.0 | 210 | 2023 |
| GLS GLS 450 d 4MATIC · A9 · 2989 cc | Hybrid | 31.0 mpg | 9.1 | 239 | 2023 |
| GLS GLS 450 4MATIC · A9 · 2999 cc | Hybrid | 27.7 mpg | 10.2 | 232 | 2023 |
| GLS GLS 450 4MATIC · A9 · 2999 cc | Hybrid | 24.1 mpg | 11.7 | 266 | 2023 |
| GLS AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 22.4 mpg | 12.6 | 286 | 2022–2023 |
| GLS AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 21.7 mpg | 13.0 | 295 | 2022–2023 |
| GLS Maybach GLS 600 4MATIC · A9 · 3982 cc | Hybrid | 21.7 mpg | 13.0 | 296 | 2022–2023 |
| GLS Maybach GLS 600 4MATIC · A9 · 3982 cc | Hybrid | 21.1 mpg | 13.4 | 305 | 2022–2023 |
| GLS Mercedes-Maybach GLS 600 4MATIC · A9 · 3982 cc | Hybrid | 20.3 mpg | 13.9 | 314 | 2023 |
| GLS Mercedes-Maybach GLS 600 4MATIC · A9 · 3982 cc | Hybrid | 19.9 mpg | 14.2 | 320 | 2023 |
| GLS GLS 400 d 4MATIC · A9 · 2925 cc | Diesel | 36.7 mpg | 7.7 | 210 | 2021 |
| GLS GLS 400 d 4MATIC · A9 · 2925 cc | Diesel | 29.1 mpg | 9.7 | 210 | 2021 |
| GLS GLS 400 d 4MATIC · A9 · 2925 cc | Diesel | 29.1 mpg | 9.7 | 251 | 2021 |
| GLS GLS 400 d 4MATIC · A9 · 2925 cc | Diesel | 29.1 mpg | 9.7 | 252 | 2021 |
| GLS AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 24.8 mpg | 11.4 | 286 | 2021 |
| GLS AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 23.7 mpg | 11.9 | 286 | 2021 |
| GLS AMG GLS 63 4MATIC+ · A9 · 3982 cc | Hybrid | 23.7 mpg | 11.9 | 295 | 2021 |
| GLS Maybach GLS 600 4MATIC · A9 · 3982 cc | Hybrid | 23.7 mpg | 11.9 | 295 | 2021 |
| GLS Maybach GLS 600 4MATIC · A9 · 3982 cc | Hybrid | 22.8 mpg | 12.4 | 295 | 2021 |
| GLS Maybach GLS 600 4MATIC · A9 · 3982 cc | Hybrid | 22.8 mpg | 12.4 | 305 | 2021 |
NEDC figures, VCA lists 2017–2018
NEDC was the official test before WLTP. NEDC figures are noticeably more optimistic, so do not compare them with WLTP figures.
| Version | Fuel | Combined | L/100 km | CO₂ g/km | In lists |
|---|---|---|---|---|---|
| GLS GLS 350 d 4MATIC with 21'' rear wheels · A9 · 2987 cc | Diesel | 35.3 mpg | 8.0 | 203 | 2018 |
| GLS AMG GLS 63 4MATIC with 21'' rear wheels · A7 · 5461 cc | Petrol | 23.0 mpg | 12.3 | 288 | 2016–2018 |
| GLS GLS 350 d 4MATIC with 21'' rear wheels · A9 · 2987 cc | Diesel | 37.2 mpg | 7.6 | 199 | 2016–2017 |
Using these figures
"In lists" shows which yearly VCA lists include the version; it is not the model year. Manufacturers supply figures to the VCA voluntarily, so some makes are missing from some years' lists (for example several large brands between 2019 and 2024); a gap in the years does not mean the car was not sold. Click an mpg figure to open the trip fuel cost calculator with it in UK units, or convert it with the fuel economy converter. Real-world economy is usually lower than official figures — measure yours with the MPG calculator.
Tyre and wheel sizes for this model: Mercedes-Benz GLS tyre sizes.
Source: Vehicle Certification Agency (VCA), Car Fuel Data — official data download (lists 2016–2026, downloaded 2026-10-22). © Crown copyright, reused under the licence published for this dataset on data.gov.uk (Creative Commons Attribution). Data processed by us (duplicates merged, model names tidied); the VCA is not responsible for our use of it. The VCA states that figures are supplied by manufacturers, may not be achieved in real-world driving, and are used at the user's own risk.