2007 Mercedes C-Class Owner's Manual - Page 210

Controls in detail Audio system Switching on the telephone Switching on the telephone Press h button. If the telephone was previously switched off, PROCESSING appears in the display and you will then be prompted to enter your PIN. Switching off the telephone Press h button for approx. 3 seconds. PROCESSING appears in the display until PIN entry i If the PIN is entered incorrectly three times, NEED PUK will appear in the display. Enter PUK via your telephone. Please refer to the separate telephone operating instructions for more information. Adjusting the volume Enter PIN number using buttons 1 to R. If necessary, correct number entered with the CLR soft key. Press soft key briefly to delete the last digit entered; press soft key and hold to delete the complete number. Press OK soft key after entering correct PIN. READY or ROAMING will appear in the Turn rotary control of N button during a telephone call. The volume will increase or decrease depending on the direction turned. i The volume can be adjusted separately for telephone mode and audio mode. the telephone is off. Afterward, PHONE OFF appears in the display. Adjusting sound Adjust sound during a telephone call. Sound adjustment ( page 191). display. 209