58General operationGeneral OperationSwitching on/off Press .The unit can also be switched on/off viathe vehicle ignition.To switch the unit on via the ignition, theunit must have previously been turnedoff via the ignition.After switching off the ignition, the unitcan be prevented from switching off bypressing the button within 3 sec-onds.Setting the volumeTurn the left-hand rotary control .The volume increases or decreases.Activating the tone menuPress . The tone menu is activated.The following functions can be calledup: Bas (Bass), Trb (Treble), Fad(Fader), Bal (Balance), Flt (Linearadjustment), Sub (Subwoofer) and Ldn(Loudness).Settings for bass and treble, for the FM,AM (MW, LW, SW) wavebands, forroad traffic announcements, telephonemode, CD, MP3/WMA and CDC/AUXmode are stored separately.Setting the bass Press the button and then themultifunction button. Set the desired bass level using theright-hand rotary control .Setting the treble Press the button and then themultifunction button. Set the desired treble level using theright-hand rotary control .Note:The unit can also be switched on withthe ignition switched off via thebutton, but it will switch off automati-cally after 1 hour.