- Mercedes-Benz GLS-Class range expected to be updated for 2027 model year
- A GLS 63 prototype is out testing with light camouflage gear only
- Plug-in hybrid powertrain is possible for GLS 63
Mercedes-Benz is working on an update for the GLS-Class, and the latest prototype to be spotted is for the fiery AMG GLS 63 model.
Earlier shots show prototypes for updated versions of the regular GLS-Class and ultra-luxury Maybach GLS-Class.
The current GLS-Class arrived for the 2020 model year and was given an update for 2024; the latest prototypes are for a second update for the full-size SUV. This second update, which will likely be introduced for the 2027 model year in the U.S., is expected to be more substantial than the somewhat mild previous update.
We're still in the early stages of development, judging by the lack of visual changes on the prototype. Light camouflage gear points only to new headlights being tested. Non-visible elements like chassis and powertrain systems may also be new, though.
It isn't clear what Mercedes has planned for the mechanical components. New plug-in hybrid powertrains are possible, particularly for the GLS 63. The smaller GLE 53 is already confirmed by AMG to be receiving a plug-in hybrid powertrain for the 2026 model year.
2027 Mercedes-Benz AMG GLS 63 facelift spy shots - Photo via Baldauf
The GLS 63 is currently offered with a twin-turbocharged 4.0-liter V-8 rated at 603 hp. The engine works together with a 48-volt mild-hybrid system and drives all four wheels via a 9-speed automatic transmission.
In the regular GLS-Class, it's possible the available V-8 gets dropped, just like the updated 2025 G-Class which only offers a V-8 in AMG G 63 guise.
Mercedes doesn't normally update its vehicles more than once during a traditional product cycle which lasts 7-8 years, but a second update for the GLS-Class suggests the SUV will stick around longer than that. This move is in response to Mercedes reportedly extending the sales timeline for some of its current gas-powered vehicles beyond what was initially planned.
The decision comes as demand for electric vehicles has been slower than anticipated. Although Mercedes aimed to transition entirely to electric vehicles by 2030, the automaker announced in February that it will continue selling gas-powered models beyond that deadline.
A second facelift is also planned for the GLE-Class range, and the S-Class is another vehicle that is expected to have two facelifts to extend its product cycle.
