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Mobile phone system, function - GF82.70-P-0007CAJ

MODEL 207.3/4 with CODE (527) COMAND APS with single DVD drive (with navigation) with CODE (498) Japan version up to model year 2011/YoM 10 

Fig 1: Mobile Phone System Block Diagram
G10081972Courtesy of MERCEDES-BENZ USA

Function requirements for mobile phone system, general 

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

IMPORTANT A Bluetooth-compatible mobile phone can only be operated in the vehicle when a mobile phone is not connected to the cell phone separation point or the adapter cable.

IMPORTANT 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.

Mobile telephone system, general 

The mobile phone system allows mobile phones operating with the Personal Digital Cellular (PDC), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA) or Freedom of Mobile Multimedia Access (FOMA) networks to be operated in the vehicle.

IMPORTANT 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 IMPORTANT .

The mobile phone system consists of the following subfunctions:

Switching on and off characteristics 

For status "circuit 30 ON" the COMAND control unit has to be manually switched on so that the mobile phone is switched on via a wake-up pulse from the COMAND control unit.

For status "circuit 15R ON" the COMAND controller unit is automatically switched on; this in turn also automatically switches on the mobile phone by means of a wake-up pulse from the COMAND controller unit.

The mobile phone can be switched off at status "circuit 30 ON" by manually switching off the COMAND controller unit, which sends a corresponding signal to the mobile phone, or following expiration of the run-on time as configured on the mobile phone.

The mobile phone is switched off automatically at status "circuit 15R OFF" by the COMAND controller unit, which sends a corresponding signal to the mobile phone, or following expiration of the run-on time as configured on the mobile phone.

IMPORTANT A mobile phone operated with Bluetooth can be switched on and off only with the buttons on the mobile phone itself.

The switch-on and switch-off function consists of the following two subfunctions:

Switch on function sequence 

The switch on signal (wake-up pulse) is forwarded by the COMAND controller unit as follows to the mobile phone:

The mobile phone is then switched on and supplied with power. After the mobile phone is switched on, a lock code inquiry is made if the mobile phone is so configured and transmits this status.

The lock code inquiry is relayed by the COMAND control unit to the audio/COMAND display as well as via the interior CAN to the instrument cluster.

Depending on the request concerned the lock-code must be entered by one of the following options:

The control signals of the mobile phone buttons are forwarded via the following route to the COMAND controller unit:

The control signals from the Audio/COMAND control panel are forwarded via the telematics CAN to the COMAND controller unit. The control signals from the COMAND controller unit telephone buttons are processed internally. After entering the lock-code, the reception status is received by the COMAND controller unit in the following way over the multifunction antenna:

The reception status is shown by the COMAND controller unit over a low voltage differential signaling line on the Audio/COMAND display.

IMPORTANT A mobile phone operated with Bluetooth processes the switch-on signal internally in the mobile phone. The lock code inquiry is only shown on the display of the mobile phone, if configured on the mobile phone and if the mobile phone transmits this status. The lock-code can only be entered using the mobile phone buttons. The reception status is received by the mobile phone's antenna. The display of the lock-code and the reception status as well as the signals of the mobile phone buttons are processed internally in the mobile phone.

Switch off function sequence 

The switch-off signal is forwarded by the COMAND controller unit to the mobile phone via the following route:

The mobile phone is then switched off and power supply interrupted. Expiration of the run-on time configured in the mobile phone takes place internally in the mobile phone.

IMPORTANT A mobile phone operated with Bluetooth processes the switch-off signal internally in the mobile phone. If the rechargeable battery of the mobile phone is empty, the mobile phone is also switched off. This process also runs internally in the mobile phone.

Establishing call and terminating call 

The establish call and terminate call function consists of the following subfunctions:

D Function sequence for establishing and terminating calls via buttons on mobile phone 

D Function sequence for establishing and terminating calls via telephone buttons on COMAND control unit 

D Function sequence for establishing and terminating calls via left multifunction steering wheel button group and right multifunction steering wheel button group 

D Establish call function sequence using voice control system (VCS [SBS]) 

D Function sequence for establishing and terminating calls in hands-free mode 

Function sequence for establishing and terminating calls via mobile telephone buttons 

Dialing the telephone number using the buttons on the mobile phone or selecting the telephone number from the mobile phone's telephone book and pressing the "Accept call button" initiates the telephone call in hands-free mode.

Pressing the "QUIT" button on the mobile phone terminates the telephone call.

The control signals of the mobile phone buttons are internally processed and forwarded via the following route to the COMAND controller unit:

IMPORTANT With a mobile phone operating with Bluetooth, the control signals from the buttons on the mobile phone are processed internally. They are not forwarded to the COMAND controller unit. The telephone call is completed in "Private mode" when the mobile phone supports "Private mode" "Private mode" is activated.

Function sequence for establishing and terminating calls via telephone buttons on COMAND control unit 

Dialing the telephone number using the phone buttons on the COMAND controller unit and pressing the "Accept phone call" button establishes the telephone call in the hands-free mode. Pressing the "END" button on the COMAND controller unit terminates the telephone call.

The control signals from the COMAND controller unit telephone buttons are processed internally.

Function sequence for establishing and terminating calls via audio/COMAND control panel 

The basic telephone (ComTel) function is activated using the TEL hardkey on the COMAND controller unit or the ComTel menu item in the application bar on the Audio/COMAND display using the Audio/COMAND control panel and then shown on the Audio/COMAND display.

The user can then select a telephone number via the Audio/COMAND control panel using one of the following options:

Activating the "SEND" function establishes the telephone call in the hands-free mode.

When the "Reject" option is activated in the basic ComTel function on the Audio/COMAND display, the telephone call is terminated. The control signals from the COMAND controller unit TEL hardkey are processed internally.

The control signals from the Audio/COMAND control panel are forwarded over the telematics CAN to the COMAND controller unit. The menu item is shown on the Audio/COMAND display by the COMAND controller unit via an LVDS line.

Function sequence for establishing and terminating calls via multifunction steering wheel button group 

The address book of the COMAND controller unit or the phone book of the mobile phone is selected by pressing the system selection button (S110s3) via the selection menu in the instrument cluster. The name of the person to be called is selected by scrolling forward and back in the address book of the COMAND controller unit or the phone book of the mobile phone using the scroll forward and back button (S110s1).

A telephone call can be completed in the hands-free mode as well as terminated with the accept and end phone call button (S111s3) in the corresponding subfield.

The control signals of the multifunction steering wheel button groups are forwarded over the following components to the COMAND controller unit:

The display in the instrument cluster is generated by the COMAND controller unit over the interior CAN.

Establish call function sequence using voice control system 

Pressing the voice control system ON button (S111s4) of the right multifunction steering wheel button group activates the voice control of the voice control system.

The voice control system button control signal is forwarded via the following components to the COMAND controller unit:

A signal tone is emitted after the voice control system has been activated.

The signal sound is output by the COMAND controller unit via direct lines to the speaker system.

IMPORTANT More detailed information on the speaker system is available in the Speaker output function documentation.

Now different voice commands can be used to search and select a telephone number.

The voice commands are recorded by the hands-free system microphone and forwarded via a direct line to the COMAND controller unit.

The voice control of the voice control system (VCS [SBS]) is used to establish the telephone call in the hands-free mode.

IMPORTANT The individual voice commands are listed in the "Linguatronic operator's manual".

Function sequence for establishing and terminating calls in hands-free mode 

After the telephone call has been established the COMAND controller unit transmits or receives the mobile phone signals or data via the following route:

The voice input in hands-free mode is recorded by the hands-free system microphone and forwarded via a direct line to the COMAND controller unit.

The signals for the voice output are transmitted by the COMAND control unit to the speaker system via direct line.

IMPORTANT More detailed information on the speaker system is available in the Speaker output function documentation.

IMPORTANT For a mobile phone operated using Bluetooth, the COMAND controller unit sends or receives the mobile phone signals or data over the Bluetooth antenna and the mobile phone, except when the buttons on the mobile phone were used for dialing. If the buttons on the mobile phone are used for dialing, then the mobile phone sends or receives the mobile phone signals or data directly. Voice input and voice output are conducted through the mobile phone ("Private Mode").

Once the telephone call has been terminated, the COMAND controller unit interrupts transmission or reception of the mobile phone signals or data. This happens internally in the COMAND controller unit.

IMPORTANT With a mobile phone operated with Bluetooth, the COMAND controller unit discontinues transmission or reception of the mobile phone signals and data in an internal control unit procedure except when a call is terminated using the buttons on the mobile phone.

When a telephone call is terminated using the mobile phone buttons, the mobile phone interrupts the transmission or reception of mobile phone signals or data. This process runs internally in the mobile phone.

Accepting, rejection a call and control of call waiting 

Accepting a call, rejecting a call and control of call waiting consists of the following subfunctions:

D Function sequence, call signal 

D Function sequence for accepting and rejecting a call via mobile phone buttons 

D Function sequence for accepting and rejecting a call via telephone buttons on COMAND control unit 

D Function sequence for accepting and rejecting a call over the Audio/COMAND control panel 

D Function sequence for call acceptance or rejection through left multifunction steering wheel button group and right multifunction steering wheel button group 

D Function sequence, telephone call in hands-free mode 

D Function sequence for call switching control 

Function sequence, call signal 

The mobile phone receives a call signal from the multifunction antenna 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 as follows:

The ring sound is emitted by the COMAND controller unit via direct lines at the speaker system.

IMPORTANT More detailed information on the speaker system is available in the Speaker output function documentation.

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. The instrument cluster receives the required data via the interior CAN from the COMAND controller unit.

IMPORTANT A Bluetooth-operated mobile phone forwards the call signal over the Bluetooth antenna to the COMAND controller unit.

Function sequence for accepting and rejecting a call via mobile phone buttons 

Pressing the "Accept call" button on the mobile phone serves to accept the call in hands-free mode. 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:

IMPORTANT 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:

Function sequence for accepting and rejecting a call via telephone buttons on COMAND control unit 

Pressing the "Accept phone call" button on the COMAND controller unit serves to accept the call in hands-free mode.

Pressing the "End" button on the COMAND controller unit once puts the call on hold. Pressing the "END" button twice on the COMAND controller unit rejects the call.

The control signals from the COMAND controller unit telephone buttons are processed internally.

Function sequence for accepting and rejecting a call over the Audio/COMAND control panel 

The caller identification is shown on the Audio/COMAND display by the COMAND controller unit via an LVDS line by means of the call signal.

Selection of the "Accept" option using the Audio/COMAND control panel enables the call to be accepted in hands-free mode. 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.

Function sequence for accepting and rejecting a call via multifunction steering wheel button group 

The call is accepted or rejected in hands-free mode by pressing the accept/terminate phone call button in the corresponding subfield. The control signal of the accept/terminate phone call button are forwarded via the following components to the COMAND controller unit:

Function sequence for 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:

Voice input in the hands-free mode is recorded by the hands-free system microphone and forwarded via a direct line to the COMAND controller unit and from there emitted by means of direct lines at the following speaker system:

IMPORTANT With a mobile phone operated with Bluetooth, the COMAND controller unit receives or transmits the mobile phone signals or data over the Bluetooth antenna:

IMPORTANT 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".

IMPORTANT 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.

IMPORTANT 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.)

Function sequence for control of call waiting 

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. If the incoming call is accepted, it is activated in hands-free mode and the existing call is terminated. The incoming telephone call can be accepted or rejected with the telephone buttons on the COMAND control unit, the audio/COMAND control panel or the telephone call acceptance and termination button the button group on the right side of the multifunction steering wheel. The control signals from the COMAND controller unit telephone buttons are processed internally.

The control signals from the Audio/COMAND control panel are forwarded over the telematics CAN to the COMAND controller unit. The control signals from the telephone accept/terminate call are relayed to the COMAND control unit via the following components:

Address book 

The address book contains the address entries stored in the COMAND controller unit. The user can manage all the contact data in the address book (view, edit, add, delete and create).

With a mobile phone connected to the Japan electrical connector adapter cable, data (names and standard numbers) can also be loaded from the phone book of the mobile phone into the address book of the COMAND controller unit. The data from the phone book of the mobile phone is also permanently available, even if the mobile phone is no longer attached to the Japan electrical connector adapter cable.

Data can also be transferred from other external devices (e.g. PDAs, laptops, etc.) to the address book via the Bluetooth interface of the mobile phone and the Bluetooth antenna. vCards can also be copied from a Personal Computer Memory Card International Association (PCMCIA) memory card to the address book over the COMAND controller unit's card reader.

These data are then permanently available as address entries. Address-relevant mobile phone system functions can be directly started and supplied with the stored data via address book entries. Address entries can contain the following:

Address entries can only be removed by deleting individual entries or by deleting the entire address book.

150 entries with voice commands (Voice Tags) are available for the voice control system (VCS). The call can be established via the VCS [SBS] for each entry with a completed "Yomigana field". The address book displays the address entries stored in the COMAND controller unit and the data loaded from the mobile phone's telephone book.

IMPORTANT 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).

"Seamless Switch" 

"Seamless switch" means either than an existing call to the mobile phone is held when the phone is separated from the Japan electrical connector adapter cable or that an existing call is routed to the COMAND controller unit when the mobile phone is connected to the Japan electrical connector adapter cable.

"Private Mode" 

When in "Private mode", the user can make a telephone call without other vehicle occupants being able to hear the conversation. To make a call in "Private Mode", one of the following processes must be completed:

IMPORTANT With a mobile phone operated with Bluetooth, the phone call is completed in "Private mode" if the mobile phone supports "Private mode" and "Private mode" is activated.

REFER TO SYSTEM WIRING DIAGRAMS Electrical function schematic for cellular phone   PE82.70-P-2051-97EAB
  Overview of system components, telematics   GF82.85-P-9999CA
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