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Home >> Mercedes Benz >> 2010 >> C 300 4MATIC (204.081) V6-3.0L (272.948) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Cellular Phone >> Description and Operation >> GF82.70-P-2018CE Accept Call and Reject Call With the Mobile Phone System, Function

GF82.70-P-2018CE Accept Call and Reject Call With the Mobile Phone System, Function



GF82.70-P-2018CE Accept Call And Reject Call With The Mobile Phone System, Function
- with CODE (386) Mobile phone
- with CODE (389) Mobile phone preinstallation with universal interface, USA/Canada
- with CODE (523) MB Audio 20 radio
- with CODE (510) Audio 20 with CD changer
- with CODE (525) MB Audio 50 APS radio
- with CODE (511) Audio 50 APS with DVD changer
- with CODE (527) COMAND APS with single DVD drive (with navigation)
- with CODE (512) COMAND APS with DVD changer
- except CODE (498) Japan version


Function requirements, general
^ Circuit 30 ON
^ Enabled Subscriber Identification Module (SIM) card inserted in mobile phone
^ Correct Personal Identification Number (PIN) entered, if set on the mobile phone
^ A mobile telephone network available in adequate strength and quality
^ Compatible mobile phone inserted into mobile phone cradle (A34/15) which is connected to Bluetooth module (A34/7) (comfort telephony) or Bluetooth-compatible mobile phone in vehicle and authorized on "Audio equipment" (basic telephony)

Depending on the equipment installed one of the following control units is installed, hereafter referred to as the "audio unit":
- Radio (A2) (with code (523) Radio MB Audio 20 or code (510) Audio 20 incl. CD changer)
- Radio with autopilot system (A2/56) (with code (525) Radio MB Audio 50 APS or code (511) Audio 50 APS incl. DVD changer)
- COMAND control unit (A40/3) (with code (527) COMAND APS with single DVD drive (with navigation) or code (512) COMAND APS incl. DVD changer or code (528) COMAND incl. DVD changer)

In order to be able to operate a Bluetooth-compatible mobile phone that is authorized on the audio equipment in the vehicle, the mobile phone must support hands-free profile (HFP) 1.0 or 1.5.
More information is available at:
- http://www.mercedes-benz.com/connect

A call is accepted or rejected via:
- Buttons on mobile phone (basic telephony)
- Telephone buttons on audio equipment
- Audio/COMAND control panel (A40/9)
- Left multifunction steering wheel button group (S110) and right multifunction steering wheel button group (S111)
- Voice control for voice control system (VCS) (acceptance only) (with code (511) Audio 50 APS incl. DVD changer or code (527) COMAND APS with single DVD drive (with navigation) or code (512) COMAND APS incl. DVD changer)

The audio signal for the signal tones and the telephone calls is output on the speaker system.
For this purpose the audio equipment actuates on vehicles without code (810) Sound system the following speakers:
- Left front door speaker (H4/1)
- Right front door speaker (H4/2)
- Left rear door speaker (H4/3)
- Right rear door speaker (H4/4)

On vehicles with code (810) Sound system, the audio equipment transmits the call tone via the media-oriented system transport (MOST) to the sound system amplifier control unit (N40/3) which processes the latter and relays it for output via direct lines to the following speakers.
- Left front door speaker
- Right front door speaker
- Left rear door speaker
- Right rear door speaker
- Center dashboard speaker (H4/27)
- Bass speaker (H4/29) (model 204.0/2)
- Left rear surround speaker (H4/54)
- Right rear surround speaker (H4/57)

On model 204.0 the right rear surround speaker is integrated into the bass speaker.
On model 204.9 the audio signal for the rear bass speaker (H4/38) runs from the sound system amplifier control unit to the rear bass speaker amplifier (N40/9) and from there via direct lines to the rear bass speaker.
At the same time, the "audio equipment" mutes the currently active audio source (e.g. in radio mode) (MUTE). Call recognition is displayed on the audio/COMAND display (A40/8) and in the instrument cluster (A1). For this purpose the audio equipment transmits the corresponding information via the telematics CAN (CAN A) and interior CAN (CAN B).

Accept call and reject call with the mobile phone system, general
The mobile phone can be used by the user to initiate or terminate a telephone call to another person in the mobile phone system network or the fixed-line network.
The "Accept call and reject call with the mobile phone system" function consists of the following subfunctions:
^ Function sequence, call signal
^ Function sequence for accepting call via the buttons on the mobile phone (basic telephony)
^ Function sequence for accepting call via telephone buttons on audio equipment
^ Function sequence for accepting call via Audio/COMAND control panel
^ Accept call function sequence over multifunction steering wheel button groups
^ Function sequence for accepting call via VCS (with code (511) Audio 50 APS incl. DVD changer or code (527) COMAND APS with single DVD drive (with navigation) or code (512) COMAND APS incl. DVD changer)
^ Function sequence, telephone call in hands-free mode
^ Function sequence for rejecting call via the buttons on the mobile phone (basic telephony)
^ Function sequence for terminating call via telephone buttons on audio equipment
^ Reject call function sequence over multifunction steering wheel button groups
^ Function sequence for rejecting call via Audio/COMAND control panel

The system is described using the comfort telephony as an example. Differences from the basic telephony are marked by the symbol.

Function sequence, call signal
The mobile phone receives a call signal via the following route:
- Multifunction antenna (A28/11) and direct line (with code (386) Mobile phone without code (228) Stationary heater)
- Coaxial cable via multifunction antenna, mobile phone and stationary heater radio remote control antenna splitter (A2/53) and antenna amplifier/cellular telephone system compensator (A28/3) (with code (386) Mobile phone and code (228) Stationary heater)
- Multifunction antenna, direct line, frequency switchover control unit (N96) (with code (359) TELE AID emergency call system) and direct line (with code (389) Mobile phone preinstallation with universal interface USA/Canada)
- Bluetooth module
- Cradle

Information about the caller is displayed on the mobile phone's screen. The display on the mobile phone's screen is forwarded internally.

The call signal is forwarded to the Audio/COMAND display as follows:
- Cradle
- Bluetooth module
- Bluetooth antenna (A2/91)
- Direct line
- Audio equipment
- Low voltage differential signal (LVDS) line

With basic telephony, the mobile phone receives the call signal via the mobile phone antenna. The call signal is then forwarded to the "audio unit" in the following way:
- Bluetooth antenna
- Direct line

Function sequence for accepting call via the buttons on the mobile phone (basic telephony)
Pressing the "Accept call" button on the mobile phone serves to accept the call in hands-free mode. The control signals from the buttons on the mobile phone are processed internally.

Function sequence for accepting call via telephone buttons on audio equipment
The call signal serves to display the call identification on the Audio/COMAND display. Pressing the "Accept call" button on the "audio equipment" serves to accept the call in handsfree mode. The control signals from the buttons on the "audio unit" are processed internally.

Function sequence for accepting call via Audio/COMAND control panel
The call identification is shown on the Audio/COMAND display. Selection of the corresponding "Accept" option using the Audio/ COMAND control panel enables the call to be accepted in hands- free mode. he control signals from the Audio/COMAND control panel are forwarded to the "audio equipment" via the telematics CAN.

Accept call function sequence over multifunction steering wheel button groups
The call is accepted in hands-free mode by pressing the accept/ terminate phone call button (S111s3). The control signal from the accept and terminate phone call button is forwarded to the "audio equipment" via the following components:
- Direct line
- Steering wheel electronics (N135)
- Steering LIN (LIN E1)
- Steering column tube module (N80)
- Chassis CAN (CAN E)
- Instrument cluster
- Interior CAN

Function sequence for accepting call via VCS (with code (511) Audio 50 APS incl. DVD changer or code (527) COMAND APS with single DVD drive (with navigation) or code (512) COMAND APS incl. DVD changer)
The VCS is activated by pressing the voice control system button on (S111s4) the right multifunction steering wheel button group. The control signal is relayed to the audio equipment via the following route:
- Direct line
- Steering wheel electronics
- Steering LIN
- Steering column module control unit
- Chassis CAN
- Instrument cluster
- Interior CAN

The call is only accepted with the corresponding voice command. The voice commands are recorded by the voice control system microphone (B25/7) and forwarded via a direct line to the "audio equipment".

Function sequence, telephone call in hands-free mode
After the call has been accepted, the "audio unit" receives or transmits the mobile phone signals or data in the following way:

- Multifunction antenna and direct line (with code (386) Mobile phone without code (228) Stationary heater)
- Coaxial cable via multifunction antenna, mobile phone and stationary heater radio remote control antenna splitter and antenna amplifier/cellular telephone system compensator (with code (386) Mobile phone and code (228) Stationary heater)
- Direct line, frequency switchover control unit (with code (359) TELE AID emergency call system), direct line and multifunction antenna (with code (389) Mobile phone preinstallation with universal interface USA/Canada)
- Bluetooth module
- Cradle
- Bluetooth antenna
- Direct line

The voice input in hands-free mode (except "Private Mode") is recorded by the voice control system microphone and forwarded via a direct line to the "audio equipment".
For basic telephony, the "audio unit" receives or transmits the mobile phone signals or data in the following way:
- Mobile phone antenna
- Bluetooth antenna
- Direct line

In general, the telephone connection is established in handsfree mode for basic telephony and for comfort telephony after accepting the call. With comfort telephony, if the mobile phone is taken out of the cradle after placing the phone connection in hands-free mode and thus disconnected from the "audio unit", then the phone call is conducted in "private mode".

With comfort telephony, if the mobile phone is inserted into the cradle again during an ongoing phone call, the phone call is conducted again in handsfree mode.

Function sequence for rejecting call via the buttons on the mobile phone (basic telephony)
Pressing the "End" button on the mobile phone rejects the call. The control signals from the buttons on the mobile phone are processed internally.

Function sequence for terminating call via telephone buttons on audio equipment
Pressing the "End" button on the "audio equipment" rejects the call. The control signals from the telephone buttons on the "audio unit" are processed internally.

Reject call function sequence over multifunction steering wheel button groups
Pressing the accept/terminate phone call button in the corresponding subfield rejects the call.

The control signal from the accept and terminate phone call button is forwarded to the "audio equipment" via the following components:
- Direct line
- Steering wheel electronics
- Steering LIN
- Steering column module
- Chassis CAN
- Instrument cluster
- Interior CAN

Function sequence for rejecting call via Audio/COMAND control panel
Selection of the "END" function or the "Reject" function in the basic TEL function via the Audio/COMAND control panel rejects the call. he control signals from the Audio/COMAND control panel are forwarded to the "audio equipment" via the telematics CAN.





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