DecodedCars2018 Mercedes-Benz G-Class
Trims, performance, features, fuel economy, safety and known problems — with the pros and cons against similar 2018 models.
- Class
- Standard Sport Utility Vehicle 4WD
- Body styles
- 4dr SUV 4WD
- Engines
- 5.5L 8-cyl turbo, 4.0L 8-cyl turbo, 6.0L 12-cyl turbo
- Drivetrain
- 4-Wheel Drive
- Fuel
- Premium Gasoline
- MPG (best)
- 13 combined · 13 city / 15 hwy
- Length
- 174.8 in
- Curb weight
- 5,622 lb
- NHTSA rating
- Not rated
- Recalls
- 0 campaigns
Pros & cons
What's good
- No recalls so far
Watch out for
- Below-average fuel economyBest version gets 13 MPG combined, 30% below the 2018 standard SUV average of 18.7 MPG.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
Calculated from EPA, NHTSA and vPIC data — not a review. How we calculate this →
Overview
The 2018 Mercedes-Benz G-Class is a standard SUV offered with 3 engines (5.5L 8-cyl turbo, 4.0L 8-cyl turbo and 6.0L 12-cyl turbo) and 4-wheel drive.
It measures about 175 inches long and 71 inches wide on a 112-inch wheelbase, with a curb weight of roughly 5,622 lb.
EPA rates its most efficient version at 13 MPG combined (13 city / 15 highway), 30% worse than the 2018 standard SUV average of 18.7 MPG, for an estimated $6,300 a year in fuel.
NHTSA has not published a 5-Star overall rating for this model year.
There are no recalls or owner complaints on file with NHTSA for this model year.
What changed for 2018
No changes to engines, powertrains, drivetrains, size, EPA ratings or NHTSA crash rating compared with the 2017 G-Class — a carry-over year in the data.
Compared with 2017; trim, feature and price changes aren't covered. See the 2017 G-Class →
Dimensions & weight
| Body | Length | Width | Height | Wheelbase | Track F / R | Curb weight | Weight F/R |
|---|---|---|---|---|---|---|---|
| 4dr SUV 4WD | 174.8 in | 71.3 in | 78 in | 112.2 in | 60.6 / 59.8 in | 5,622 lb | 53/47 |
Transport Canada CVS (Open Government Licence – Canada), Canadian-market figures.
Will it fit your garage? Check with your measurements →Engines, MPG & running costs
| Version | Engine | Transmission | Drive | City / Hwy / Comb | vs. class | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|---|---|
| AMG G63 | 5.5L 8-cyl turbo | Automatic 7-spd | 4-Wheel Drive | 12 / 15 / 13 | -30% | $6,300 | 674 |
| G550 | 4.0L 8-cyl turbo | Automatic 7-spd | 4-Wheel Drive | 13 / 14 / 13 | -30% | $6,300 | 660 |
| AMG G65 | 6.0L 12-cyl turbo | Automatic 7-spd | 4-Wheel Drive | 11 / 13 / 12 | -36% | $6,850 | 762 |
| G550 4x4 | 4.0L 8-cyl turbo | Automatic 7-spd | 4-Wheel Drive | 11 / 11 / 11 | -41% | $7,450 | 829 |
EPA estimates; "vs. class" is combined MPG against the 2018 EPA class average. How we calculate this →
Safety ratings & technology
NHTSA has not published 5-Star ratings for the 2018 Mercedes-Benz G-Class.
Recalls (0)
No vehicle recalls on file with NHTSA for the 2018 Mercedes-Benz G-Class.
Check your VIN for open recalls at NHTSA ↗Not every 2018 Mercedes-Benz G-Class is affected — only a VIN check confirms your car.
Owner-reported problems
No owner complaints for the 2018 Mercedes-Benz G-Class in NHTSA's database since 2015.
Used 2018 Mercedes-Benz G-Class buyer's checklist
- Run the VIN at nhtsa.gov/recalls. No recalls on file, but check anyway.
- Before you pay: service records, a history report and an independent inspection.
Generated by DecodedCars from NHTSA recalls and owner complaints for the 2018 Mercedes-Benz G-Class. Not a substitute for a professional inspection.
Other G-Class years
Compare all years →| Year | MPG (best) | Length | Overall | Recalls | Complaints |
|---|---|---|---|---|---|
| 2027 G-Class | 15 | – | Not rated | 0 | 0 |
| 2026 G-Class | 18 | 181.9 in | Not rated | 0 | 0 |
| 2025 G-Class | 18 | 181.9 in | Not rated | 0 | 0 |
| 2024 G-Class | 14 | 181.9 in | Not rated | 0 | 0 |
| 2023 G-Class | 14 | 181.9 in | Not rated | 0 | 0 |
| 2022 G-Class | 16 | 181.9 in | Not rated | 0 | 0 |
| 2021 G-Class | 18 | 181.9 in | Not rated | 0 | 0 |
| 2020 G-Class | 14 | 181.9 in | Not rated | 0 | 0 |
| 2019 G-Class | 14 | 181.5 in | Not rated | 0 | 0 |
| 2017 G-Class | 13 | 174.8 in | Not rated | 0 | 0 |
| 2016 G-Class | 13 | 174.8 in | Not rated | 0 | 0 |
| 2015 G-Class | 13 | 174.8 in | Not rated | 0 | 0 |
Sources: EPA, NHTSA, Transport Canada, Wikimedia Commons. Not affiliated with NHTSA, the EPA or Mercedes-Benz. How we calculate this →