The braking (B) position of the running mode selector is unique to the Prius Only use this when traveling down a long steep hill to save wear on the mechanical brakes or relieve an ache in your braking foot If you engage this mode during normal driving you will at minimum ruin your fuel economy If you don't live in a mountainous area, you may never need this mode
The mechanical bending, flanging, folding and forming of sheet or plate material using a press, folding, or box brake