DecodedCarsMercedes-Benz GLS-Class vs Tesla Model X
2026 Mercedes-Benz GLS-Class vs 2026 Tesla Model X — two standard SUVs compared on efficiency, size, safety and reliability.
The short version
That works out to about $3,200 a year less in fuel for the Tesla Model X (EPA estimate, 15,000 miles).
The Mercedes-Benz GLS-Class is the bigger car, about 7 inches longer.
Across all model years since 2005, the Mercedes-Benz GLS-Class has had fewer recall campaigns (0 vs 39).
The two cars
The 2026 Mercedes-Benz GLS-Class is a standard SUV offered with 2 engines (3.0L 6-cyl turbo and 4.0L 8-cyl turbo), including a hybrid version and all-wheel drive. It measures about 206 inches long and 80 inches wide on a 123-inch wheelbase, with a curb weight of roughly 6,074 lb (Amg 63 4matic 4dr SUV).
The 2026 Tesla Model X is a standard SUV powered by electricity and all-wheel drive. It measures about 198 inches long and 79 inches wide on a 117-inch wheelbase, with a curb weight of roughly 5,269 lb.
Buying used? The 2024 GLS-Class and the 2024 Model X have the fewest problems in our data; avoid the 2016 Model X.
Basics
Efficiency
Performance & space
Safety & reliability
Interest
Green = clearly better. Prices are not included. How we calculate this →
Which one should you choose?
Choose the Mercedes-Benz GLS-Class if…
- You want more room (7 in longer)
- You put reliability history first (0 vs 39 recalls since 2005)
Choose the Tesla Model X if…
- You want an EV with more range (352 miles)
- You want something easier to park (7 in shorter)
Pros & cons of each
2026 Mercedes-Benz GLS-Class
- Hybrid version availableOffered as a hybrid as well as gas.
- Premium fuel requiredEvery gasoline version is rated for premium, which raises running costs.
2026 Tesla Model X
- Long EV rangeUp to 352 miles on a charge (EPA).
- Lots of standard safety tech5 of 5 key driver aids standard on the versions we checked.
Full 2026 Mercedes-Benz GLS-Class specs →Full 2026 Tesla Model X specs →Compare fuel costs for your driving →Compare size & garage fit →