2008 Mercedes C-Class Owner's Manual - Page 213

Controls in detail Audio system You must observe the following when assigning track names: Track names must have at least one character. Track names must have the extension "mp3". There must be a period between the track name and the extension. Example of a correct track name: Track1.mp3 The audio system is unable to recognize an MP3 track if: there is no period between the track title and the extension there is no extension Permissible MP3 formats The audio system supports the MPEG1 Audio Layer 3 format. i This format is generally known as "MP3". Compatible file systems and compression methods The following compression methods are compatible: MP3 WMA i Only use MP3 tracks with a bit rate of at least 128 kbit/s or higher and a sampling rate of at least 44.1 kHz or higher. Smaller rates can cause a noticeable deterioration in sound quality. This is especially the case if you have activated the surround sound* function. Notes on copyright The music tracks that you create for MP3 mode and can play back in MP3 mode are generally subject to copyright protection in accordance with the applicable international and national regulations. In many countries, reproductions are not permitted without the prior consent of the copyright holder, not even for private use. Make sure you know the applicable copyright regulations and that you comply with these. If you own these rights yourself, e.g. for your own compositions and recordings, or the copyright holder has granted you permission, these restrictions do not apply. i If music files, created with different compression methods, in addition to MP3 files, are stored together on a disc, the loading process may take longer before the first track is played. i The audio system does not support ID3 tags. Permissible bit and sampling rates Fixed and variable bit rates up to 320 kbit/s Sampling rates of 24 kHz - 48 kHz 212