2010 Mercedes C-Class Owner's Manual - Page 169

Audio system vehicle may be much louder. You may need to disable these system messages or adjust the volume of these messages manually. X X 167 Select Volume in AUX mode. The selection list appears. The dot # indicates the currently selected setting. Selecting audio AUX mode: Press button h repeatedly until the main menu for AUX operation appears. X In CD mode: Select CD/MP3 Q Aux. The audio AUX menu appears. The medium in the external audio source is heard, provided it is connected and switched to playback. : Default setting ; Volume boost i Please refer to the relevant operating guide for operation of the external audio source. The following settings can be made in the audio AUX mode: RVolume (Y page 144) RBalance control and fader (Y page 145) RBass and treble control (Y page 145) RSurround sound (Y page 146) i The volume of external audio sources is extremely variable. It is possible that a device connected as an external audio source will sound quieter or louder in the vehicle or that the usual maximum volume cannot be achieved. On certain devices the volume can be set separately. In this case, start at a moderate volume and increase it slowly. In this way, you can determine whether the system is capable of playback without distortion, even at high volume. Volume adjustment for the audio device You can increase the volume for the AUX socket in case the internal volume of the connected audio device is too low. Use the setting Boost for such devices. You should set the system back to Standard before connecting a different audio device to the AUX socket. Switch back to CD mode X Press button h. Select Back To Disc in the audio AUX menu. or X Telephone Safety precautions G Warning! Please do not forget that your primary responsibility is to drive the vehicle. A driver's attention to the road must always be his/her primary focus when driving. For your safety and the safety of others, we recommend that you pull over to a safe location and stop before placing or taking a telephone call. If you choose to use the mobile phone17 while driving, please use the hands-free device and only use the mobile phone when road, weather and traffic conditions permit. Some jurisdictions prohibit the driver from using a mobile phone while driving a vehicle. Bear in mind that at a speed of just 30 mph (approximately 50 km/h), your vehicle is covering a distance of 44 feet (approximately 14 m) every second. 17 Observe all legal requirements. Z Controls in detail or