2004 Mercedes C-Class Owner's Manual - Page 194

Controls in detail Audio system Switching on the telephone Press h button. If you have programmed an unlock code for the telephone, you must enter the code now. Enter the desired telephone number using buttons 4 to M. If necessary, correct number entered with the CLR key. Press key briefly to delete the last digit entered; press key and hold to delete the complete number. Press the OK key after entering correct code. The telephone is unlocked. If you have entered the wrong code, you must repeat the entering procedure with the correct code. Switching off the telephone Press h button repeatedly until PHONE OFF appears in the display. The receiving symbol in the display disappears. Adjusting the volume Turn control knob a during telephone operation. The volume increases or decreases depending on the direction in which the knob is turned. Enter the desired telephone number using buttons 4 to M. The number can have up to 32 digits, but only 13 of these are visible on the display. If necessary, correct number entered with the CLR key. Press key briefly to delete the last digit entered. Press key and hold to delete the complete number. After correct telephone number has been entered, press the SND key. Placing a call Entering a telephone number and starting the dialing process i The volume can be adjusted separately for the telephone*, voice control system* and radio. 194