2008 Mercedes C-Class Owner's Manual - Page 231

Controls in detail Audio system TEL-Basic display Press button h on the audio control unit to call up the telephone mode. When the connected phone is ready for operation, the display will look like this: The bars indicate the current signal strength of the mobile phone network for reception. Optimum reception is indicated by all bars full. All bars empty indicates very poor or no reception. Receiver symbol s or t. The receiver symbol indicates whether a call is being connected or is in progress: t - not active READY indicates that a call is possible. NO SERVICE indicates that the mobile Setting transmit and receive volume i These settings should normally not be changed as the factory settings are matched to most mobile phones. Find out about the optimum settings for your mobile phone at an authorized Mercedes-Benz Center. i Changes may result in significant impairments to the transmission quality. These settings may not be changed during an active phone call. h Tel Phone List. Select an mobile phone from the list. Select Options Reception Volume or Transmission Volume. To set the volume: Slide qmr or rotate ymz the audio controller. The volume bar moves up or down. To confirm selection: Press n or slide omp the audio controller. The following information is displayed in the status bar: Actual time: 04:38 network is not available. Bluetooth® device name of the connected phone, in this case: blue_mobil Mobile phone network signal strength I. This information will only be shown with suitable telephones. 230