Mercedes-Benz 2003 C-Class Wagon Operator's Manual page 172

Controls in detail
Audio system
Telephone* operation
Various car telephone functions and oper-
ating steps for the car telephone can be
performed and displayed via the audio sys-
tem.
Further operating instructions not covered
here can be found in the operating instruc-
tions for the multifunction steering wheel,
voice control system* and the car tele-
phone.
Switching on the telephone
Press the h button.
If you have programmed an unlock
code for the telephone, you must input
the code now.
Press the key.
OK
The telephone is unlocked. If you enter
the wrong code, you must re-enter the
correct code.
178
Switching off the telephone
Press the h button repeatedly until
appears in the display.
PHONE OFF
The receiving symbol in the display dis-
appears.
Adjusting the volume
Turn control knob a during tele-
phone operation.
The volume increases or decreases de-
pending on the direction in which the
knob is turned.
i
The volume can be adjusted separately
for the telephone, voice control sys-
tem* and radio.
Placing a call
Entering a telephone number and start-
ing the dialing process
Enter the desired telephone number
using buttons 1 to 0.
The number can have up to 32 digits,
but only 17 of these are visible on the
display.
If necessary, correct the number en-
tered with the key. Press the key
CLR
briefly to delete the last digit entered,
press the key and hold to delete the
complete number.
After the correct telephone number
has been entered, press the key.
SND