Once the mobile phone has been authorized, you can optimize the transmission and reception volume settings. Find information on the optimal setting for your mobile phone on the Internet at
http://www.mbusa-mobile.com. Or call the Mercedes-Benz Customer Assistance Center on
1-800-FOR-MERCedes(1-800-367-6372) (for

Incorrect settings may have a significant impact on the quality of calls.

Press the function button.

Select Data/Connections in the telephone basic menu by sliding and turning the COMAND controller and press to confirm.

Select Bluetooth Telephones and press to confirm.

Select an authorized mobile phone from the list by turning .

Select Options by sliding and press to confirm.

Select Reception Volume or Transmission Volume and press to confirm.

To set the volume on scale: select by sliding the COMAND controller and press to confirm.