B means Brake mode that some designs, which includes electric powered cars, provide. You can use it to decelerate or retain downhill speed without having using the car’s brakes. The method also enables the vehicle to become driven in pure electric manner by mechanically decoupling the petrol engine. Guide transmissions https://gearbox-auto52074.goabroadblog.com/32893918/an-unbiased-view-of-gearbox-auto