Mercedes Benz C-Class (W204) Training Manual: Telephone

Telephony in model series 204 is categorized into basic and comfort telephony (SA 386).

Features of basic telephony are:

• Basic telephony is provided if the vehicle is equipped with one of the Audio 20, Audio 50 or COMAND APS versions.
• Permits a portable CTEL to be connected via Bluetooth.
• Permits hands-free operation (in the 'hands-free profile').
• Permits phone numbers to be dialed via the head unit.

Features of comfort telephony are:

• Permits a portable CTEL to be connected via a corresponding cradle.
• Permits hands-free operation.
• Permits a portable CTEL to be charged via the cradle.
• Permits a portable CTEL to be connected to the exterior antenna.
• Permits SMS messages to be received and sent.
• Permits the telephone book to be downloaded.
• Also provides the functions of basic telephony.

System networking for telephony

Basic telephony

Comfort telephony

Legend

A2 Radio
A2/18 FM, AM and CL [ZV] antenna amplifier
A2/19 Rear window antenna FM antenna amplifier
A2/91 Bluetooth antenna
A28/11 Multifunction antenna
A34/15 Mobile phone holder
A40/8 Audio/COMAND display
A40/9 Audio/COMAND control panel
A94/1 TV antenna 1 and DAB band III
B25/7 Voice control system microphone

Function Overview of Basic/Comfort Telephony

The following steps are required to connect a portable CTEL with basic telephony via Bluetooth:

• Bluetooth on portable CTEL must be activated and visible.
• Via System menu System settings Connect Bluetooth
• Or via Telephone menu Telephone Telephone list Update

Only one portable CTEL can be operated at a time with basic telephony.

The following steps are required to connect a portable CTEL with comfort telephony in the vehicle:

• The telephone (comfort telephony) must be selected via the telephone list.
• The telephone bracket must be plugged in.
• The appropriate portable CTEL must be inserted into the telephone bracket.

Legend

• M  Portable CTEL
• A34/15  Cradle

A Bluetooth module is integrated in the connector for the cradle, which enables communication between the portable CTEL and head unit. The following selections are possible after a portable CTEL has been connected via comfort telephony:

• SMS
• Manual downloading of the address book
• Voice control of telephone
• Dialing a telephone number using the numeric keys on the head unit
• Dialing a telephone number from the transferred telephone book