On the drawing, the brake height adjuster is part number 10, and 11 is the lock nut. Loosen the locknut, then screw out the height adjuster to lower the pedal height. Before doing this, you should release the locknut on the brake rod going into the master cyclinder (at the very back of the brake pedal, master cylinder and rod are dimmed in this picture), and back that off. Once you have the brake lever at the height that you want, then adjust the actuator rod so that there is 0.2mm (BMW specified gap) of free play between the height adjustment screw (11) and it's stop from the pedal at rest to where the rod first engages the master cylinder piston as you depress the brake pedal. If you lower the brake pedal without adjusting the actuator rod, you could end up with the rear brake locked or dragging. I don't remember how the brake light switch works, so check that as well. You don't want your brake light stuck on. It sounds more complicated than it is.
Ciocc
