164CD, MP3 or CDC operationCD, MP3, CDC operationSelecting the audio sourceProvided they are available, the following sources• CD (Title of a CD in the built-in drive)• MP3 (MP3 Title of a CD in the built-in drive)• MP3 (MP3 Title of an MMC™)• CDC (CDs and Title of the CD changer unit) ifinstalledmay be selected.After pressing the last selected audio source isset if possible.By pressing the first multifunction button, the unitwill switch to the next audio source. The next se-lectable audio source is always displayed abovethe multifunction button.Basic display for the CD in the built-in drive:Basic display for an MP3 CD in the built-in drive:Basic display for an inserted MMC (Multi MediaCard):Basic display for the CD changer:Operation of the individual audio sources is essen-tially identical with only a few exceptions. Thus,the basic functions are only described here once.In the example, the audio source CD (CD in built-in drive) is shown.See the following sections for special operating in-structions or notes for each of the individual audiosources:• ”MP3 CD in built-in drive” on page 167• ”MMC™ (MultiMediaCard™)” on page 168• ”CD Changer” on page 169Notes for the Compact Disc (CD)Sound interruptions may occur if the CD is soiled.In order to ensure the highest tone quality, pleasenote the following:• Always touch the CD at the edges only. Keepthe disc clean and never touch the surface.• Never stick anything on the CD.• Protect the CDs against direct sunlight and fromheat sources such as heaters etc.• Before playing the CD, you should clean it witha special, commercially available cleaningcloth, wiping from the centre outwards. Sol-vents such as petrol, thinners or other commer-cially available cleaners and anti-static spraysmust not be used.CorrectIncorrectIncorrectCorrect