The new GLB is offered with both pure electric and petrol powertrains. The electric versions are based on the MMA platform with 800V architecture: GLB 250+ features a rear-mounted single motor (268 hp, 631 km WLTP range), while GLB 350 4MATIC features dual motors with all-wheel drive (349 hp, 5.5 sec 0-100 km/h, 615 km range). The petrol version will launch in 2026 with a 1.5-litre four-cylinder turbo engine with 48V mild-hybrid technology, replacing the previous 1.3T engine.