Conditional program: Moving the top left lever up will activate the conditional program, and AFB speed control will be switched off when the target AFB speed is reached. This is normally used in S-Bahn services, where distance between stops is short and you just want to reach a target speed to start braking to the next station afterwards. Moving this lever down to the clear position simply deactivates this programm and restores normal AFB operation.
Traction/braking only: Moving the top right lever up activates the traction only program and AFB will only operate the traction, leaving brake operation to driver. This can be used while driving uphill, for instance. Moving this lever down to the braking only position will do the opposite, and AFB will only operate the brakes, leaving traction control to driver. This could be the case of a downhill ride, for instance.
Traction/braking effort: The bottom left lever is used to set the traction/braking effort for AFB operation, going from 0% to 120%.
Notched control: This allows you to manually control the traction and deactivates the AFB traction control. Holding this lever on the up position will rise the traction notches and holding it on the down one will lower them. Setting a new target speed on main AFB lever will restore the normal traction control to AFB.