Operating system 151 Audio systems 1 Also possible in Bluetooth ® audio mode. Z Function A t RPress briefly: Selects menu: Activates/deactivates the TP function Changes the track time display Activates/deactivates XMUT Switches RDS on/off Sets the type of Bluetooth® pairing RPress and hold: Displays connected mobile phone B CD drive C Display D 88 RPress briefly: Mutes the audio source RPress and hold: Ejects a CD E F RRadio: - Press briefly: Station search forwards - Press and hold: Manual station search RCD and USB audio mode: - Press briefly: Skips forward1 - Press and hold: Fast forward RAUX mode Switches over to a rear AUX port