As Ruhrbahn subscriber you get the first 30 minutes per rental for free. Registering for that concession is only possible on the Ruhrbahn website or at one of the Ruhrbahn Customer Centers in Essen or Mülheim an der Ruhr:
Subscibers of the following public transport companies will get the annual rate for 24 € instead of 48 € which includes free 30 minutes for each rental.
Members of the MWB housing cooperative will get the first 60 minutes of each rental for free. Registering takes place by entering your name, phone number and MWB membership number.