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Home >> Mercedes Benz >> 2009 >> 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-2017CEJ Mobile Phone System, Accepting Calls, Rejecting Calls and Toggling, Function

GF82.70-P-2017CEJ Mobile Phone System, Accepting Calls, Rejecting Calls and Toggling, Function



GF82.70-P-2017CEJ Mobile Phone System, Accepting Calls, Rejecting Calls And Toggling, Function
- with CODE (527) COMAND APS with single DVD drive (with navigation)


Function requirements
^ Status "circuit 30 ON"
^ Mobile phone and COMAND controller unit (A40/3) switched on
^ One mobile phone network is available in sufficient strength and quality
^ Japan electrical connector adapter cable (X39/46) connected to communications control unit (N123/6)
^ Compatible mobile phone connected to the Japan electrical connector adapter cable or Bluetooth-compatible mobile phone in the vehicle and authorized on the COMAND controller unit

The Japan electrical connector adapter cable is used to connect the various mobile phones to the communications control unit.

A Bluetooth-compatible mobile phone can only be operated in the vehicle if a mobile phone is not connected to the Japan electrical connector adapter cable. Additionally, the Bluetooth-capable mobile phone must be authorized at the COMAND controller unit and support hands-free profile (HFP) 1.0 or 1.5.
More information is available at:
- http://www.mercedes-benz.com/connect

With a mobile phone operated with Bluetooth, read access to the telephone book in the mobile phone is possible when the mobile phone supports the Bluetooth Profile Phonebook Access Profile (PBAP).

The system is described using a mobile phone connected to the Japan electrical connector adapter cable as an example. Deviations from this are indicated with the symbol.

General
The mobile phone can be used by the user to initiate, terminate or toggle a telephone call to another person in the cellular telephone system network or in the fixed-line network.
The call accept function consists of the following subfunctions:
^ Function sequence, call signal
^ Accept call function sequence using mobile phone buttons
^ Accept call function sequence over phone buttons on the COMAND controller unit
^ Accept call function sequence over Audio/COMAND control panel (A40/9)
^ Accept call function sequence over left multifunction steering wheel button group (S110) and right multifunction steering wheel button group (S111)
^ Function sequence, telephone call in hands-free mode
^ Reject call function sequence using mobile phone buttons
^ Reject call function sequence over phone buttons on the COMAND controller unit
^ Reject call function sequence over Audio/COMAND control panel
^ Reject call function sequence over multifunction steering wheel button groups
^ Toggle call function sequence over phone buttons on the COMAND controller unit
^ Toggle call function sequence over Audio/COMAND control panel
^ Toggle call function sequence over multifunction steering wheel button groups

Operating instructions
Calls can be accepted, rejected or toggled using the following controls:
- Buttons on mobile phone (no toggle)
- Telephone buttons on the COMAND controller unit
- Audio/COMAND control panel
- Multifunction steering wheel button groups

Function sequence, call signal
The mobile phone receives a call signal from the multifunction antenna (A28/11) via the Japan electrical connector adapter cable.

The caller is shown on the mobile phone display and at the same time the information is sent to the Audio/COMAND display (A40/8) as follows:
- Japan electrical connector adapter cable
- Communications control unit
- Direct line
- COMAND controller unit
- Low Voltage Differential Signal (LVDS) line

The ring tone is emitted by the COMAND controller unit via direct lines at 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)

The call identification is sent by the COMAND controller unit via a LVDS line and shown on the Audio/COMAND display. The call identification is also shown in the instrument cluster (A1). The instrument cluster receives the required data via the interior CAN (CAN B) from the COMAND controller unit.

A mobile phone operated with Bluetooth receives the call signal via the mobile phone antenna. The call signal is then forwarded to the COMAND controller unit in the via the following route:
- Bluetooth antenna (A2/91)
- Direct line

Accept call function sequence using mobile phone buttons
Pressing the "Accept call" button on the mobile phone serves to accept the call in hands-free mode. The control signals of the mobile phone buttons are internally processed and forwarded via the following route to the COMAND controller unit:
- Japan electrical connector adapter cable
- Communications control unit
- Direct line

With a mobile phone operated with Bluetooth, the control signals from the mobile phone buttons are processed internally and forwarded to the COMAND controller unit as follows:
- Mobile phone antenna
- Bluetooth antenna
- Direct line

Accept call function sequence over phone buttons on the COMAND controller unit
Pressing the "Accept call" button on the COMAND controller unit serves to accept the call in handsfree mode. The control signals from the COMAND controller unit telephone buttons are processed internally.

Accept call function sequence over Audio/COMAND control panel
Through the call signal, the call identification is sent by the COMAND controller unit over a low voltage differential signal line to the Audio/COMAND display.
Selection of the "Accept" option using the Audio/COMAND control panel enables the call to be accepted in hands-free mode. The control signals from the Audio/COMAND control panel are forwarded via the telematics CAN (CAN A) to the COMAND controller unit.

Accept call function sequence over multifunction steering wheel button groups
Pressing the accept/terminate phone call button (S111s3) in the corresponding subfield accepts the call in handsfree mode. The control signal of the accept/terminate phone call button are forwarded via the following components to the COMAND controller unit:
- Direct line
- Steering wheel electronics (N135)
- Steering LIN (LIN E1)
- Steering column module control unit (N80)
- Chassis CAN (CAN-E)
- Instrument cluster
- Interior CAN

Function sequence, telephone call in hands-free mode
After the telephone call has been accepted, the COMAND controller unit receives or transmits the mobile phone signals or data via the following route:
- Multifunction antenna
- Direct line
- Japan electrical connector adapter cable
- Direct line
- Communications control unit
- Direct line

Voice input in the hands-free mode is recorded by the voice control system microphone (B25/7) and forwarded via a direct line to the COMAND controller unit and from there emitted by means of direct lines at the following speakers:
- Left front door speaker
- Right front door speaker
- Left rear door speaker
- Right rear door speaker

With a mobile phone operated with Bluetooth, the COMAND controller unit receives or transmits the mobile phone signals or data as follows:
- Mobile phone antenna
- Bluetooth antenna
- Direct line

Generally, after accepting the call the telephone connection is established in hands-free mode, irrespective of whether the mobile phone is connected to the Japan electrical connector adapter cable or not.
If, after the telephone connection has been established in hands-free mode, a mobile phone attached to the Japan electrical connector adapter cable is disconnected from the Japan electrical connector adapter cable and therefore from the COMAND controller unit, the telephone call is then conducted in "Private Mode".
If the mobile phone is reattached to the Japan electrical connector adapter cable during a telephone call, the telephone call is then conducted in the hands-free mode again.
With a mobile phone operated with Bluetooth, it is possible to change over to "Private mode" after accepting a telephone call in hands-free mode by activating "Private mode" in the mobile phone when the mobile phone supports "Private mode".

When in "private mode" the user can make a telephone call without other vehicle occupants being able to hear the conversation.

Reject call function sequence using mobile phone buttons
Pressing the "End" button on the mobile phone rejects the call. The control signals of the mobile phone buttons are internally processed and forwarded via the following route to the COMAND controller unit:
- Japan electrical connector adapter cable
- Communications control unit
- Direct line

With a mobile phone operated with Bluetooth, the control signals from the mobile phone buttons are processed internally and forwarded to the COMAND controller unit as follows:
- Mobile phone antenna
- Bluetooth antenna
- Direct line

Reject call function sequence over phone buttons on the COMAND controller unit
Pressing the "End" button on the COMAND controller unit once puts the call on hold. Pressing the "END" button on the COMAND controller unit twice rejects the call. The control signals from the COMAND controller unit telephone buttons are processed internally.

Reject call function sequence over Audio/COMAND control panel
Through the call signal, the call identification is sent by the COMAND controller unit over a low voltage differential signal line to the Audio/COMAND display.
By selecting the "Reject" option the call is then rejected. The control signals from the Audio/COMAND control panel are forwarded over the telematics CAN to the COMAND controller unit.

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 of the accept/terminate phone call button are forwarded over the following components to the COMAND controller unit:
- Direct line
- Steering wheel electronics
- Steering LIN
- Steering column tube module control unit
- Chassis CAN
- Instrument cluster
- Interior CAN

Toggle call function sequence over phone buttons on the COMAND controller unit
If another call signal is received during a telephone call then it is displayed by the COMAND controller unit over a low voltage differential signal line on the Audio/COMAND display. The telephone call can now be accepted or rejected using the telephone buttons on the COMAND controller unit. The control signals from the COMAND controller unit telephone buttons are processed internally.
If the incoming call is accepted, it is activated in hands-free mode and the existing call is put on hold. If the incoming call is rejected, the existing call remains active in hands-free mode.

Toggle call function sequence over Audio/COMAND control panel
If another call signal is received during a telephone call then it is displayed by the COMAND controller unit over a low voltage differential signal line on the Audio/COMAND display. The telephone call can now be accepted ("Accept" option) or rejected ("Reject" option) using the Audio/COMAND control panel. The control signals from the Audio/COMAND control panel are forwarded over the telematics CAN to the COMAND controller unit. If the incoming call is accepted, it is activated in hands-free mode and the existing call is put on hold. If the incoming call is rejected, the existing call remains active in hands-free mode.

Toggle call function sequence over multifunction steering wheel button groups
If another call signal arrives when a call is already in progress, this is shown on the Audio/COMAND display by the COMAND controller unit.

The telephone call can be accepted or rejected by pressing the accept/terminate phone call button in the corresponding subfield. The control signal of the accept/terminate phone call button are forwarded over the following components to the COMAND controller unit:
- Direct line
- Steering wheel electronics
- Steering LIN
- Steering column tube module control unit
- Chassis CAN
- Instrument cluster
- Interior CAN

If the incoming call is accepted, it is activated in hands-free mode and the existing call is put on hold. If the incoming call is rejected, the existing call remains active in hands-free mode.





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