Mercedes In-Drive system mounts the brakes to the electric motorIn-Drive is a friction-based braking systemMercedes has In-Drive in active testing, hasn't given a timeline for productionMercedes-Benz is rethinking how the braking system works, and where it's located, in upcoming EVs. It's a system that relocates the entire braking system from inside the wheels to inside an EV's electric motor housing. Mercedes-Benz In-Drive brake systemReferred to internally as "the brake of the future," the In-Drive system is still a friction-based brake system that consists of a water-cooled brake disk that isn't exposed to air. Mechanical braking in EVs is only needed about 2% of the time while 98% of braking situations can be handled by regenerative braking, according to Mercedes engineers. The In-Drive braking system could be mounted on a front axle that's devoid of an electric motor, but the system would still sit in the center of the car and axle rather than by the wheels like today's brakes.