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Home >> Mercedes Benz >> 2011 >> C 350 4MATIC (204.087) (CAN) V6-3.5L (272.971) >> Repair and Diagnosis >> Accessories and Optional Equipment >> Cellular Phone >> Description and Operation >> GF82.70-P-0007CEK Mobile Phone System, Function

GF82.70-P-0007CEK Mobile Phone System, Function



GF82.70-P-0007CEK Mobile Phone System, Function

MODEL 204.0 /2
- with CODE (527) COMAND APS with single DVD drive (with navigation)
- with CODE (498) Japan version
- as of model year 2011
- up to model year 2012/YoM 10, /model refinement package 11
MODEL 204.9
- with CODE (527) COMAND APS with single DVD drive (with navigation)
- with CODE (498) Japan version
- as of model year 2011/YoM 10







A1 Instrument cluster
A2/91 Bluetooth antenna
A40/3 COMAND control unit
A40/8 Audio/COMAND display
A40/9 Audio/COMAND control panel
A67b1 Handsfree system microphone
N80 Steering column module control unit
S110 Left multifunction steering wheel button group
S111 Right multifunction steering wheel button group
CAN A Telematics CAN
CAN B Interior CAN
CAN E Chassis CAN
LIN E1 Steering LIN

Function requirements, general
- Status "circuit 30 ON"
- One mobile phone network is available in sufficient strength and quality
- Mobile phone with Bluetooth capability in vehicle and authorized at the COMAND controller unit

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 can be found at: http://www.mercedes-benz.com/connect

General
For simple and fast integration of a mobile phone into the vehicle, the COMAND controller unit supports the Bluetooth(R) standardized network technology. Bluetooth(R) is a worldwide open standard for connecting Bluetooth(R) devices (e.g. mobile phone) wirelessly and is based on radio technology in the 2.4 gigahertz (GHz) range. One advantage of Bluetooth(R), in addition to the wide availability of Bluetooth(R) devices, is the uncomplicated and spontaneous connection of Bluetooth(R) devices to a Bluetooth(R) network (ad-hoc network). The extremely high data security (128-bit encoding) and the relatively limited radius (approx. 10 m) of this type of Bluetooth(R) network are what makes the use of Bluetooth(R) in the vehicle interesting.

The COMAND controller unit can integrate the latest-generation mobile phones via the Bluetooth(R) interface of the mobile phone and the Bluetooth antenna into the vehicle hierarchy. If no mobile phone is authorized via Bluetooth(R) at the COMAND controller unit, a search can be performed via the COMAND controller unit for Bluetooth compatible devices.

If Bluetooth(R) devices were found, the user is notified of all the Bluetooth(R) devices listed in terms of trustworthiness ("trust" or "untrust"). The user can then authorize available Bluetooth(R) devices (log on), interrupt connections to trustworthy Bluetooth(R) devices or deauthorize Bluetooth(R) devices.

The mobile phone system includes the following processes:
- Switching on and off characteristics
- Establishing call and terminating call
- Accepting, rejection a call and control of call waiting
- Electronic mail (email)
- Address book
- "Private mode"
- "Seamless Switch"

Switching on and off characteristics
A mobile phone operated with Bluetooth(R) can be switched on and off only with the buttons on the mobile phone itself. A mobile phone operated with Bluetooth(R) 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.

The switch-off signal via the mobile phone button is processed 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.

Function requirements for establishing and terminating a call
- Mobile phone and COMAND controller unit are switched on

With a mobile phone operated via Bluetooth(R), read access to the phonebook of the mobile phone is possible if the mobile phone supports the Bluetooth(R) Phonebook Access Profile (PBAP).

Establishing call and terminating call
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.

A telephone call can be established or terminated using the:
- Buttons on the mobile phone
- Audio/COMAND control panel
- Telephone buttons or keypad on COMAND controller unit
- Left multifunction steering wheel button group and right multifunction steering wheel button group
- Voice control system (VCS [SBS]) (establish telephone call only)

Establishing and terminating a telephone call involve the following processes:
- Establish and terminate telephone call via the buttons on the mobile phone
- Establish and terminate telephone call via the Audio/ COMAND control panel, telephone buttons or keypad at COMAND controller unit
- Establish and terminate telephone call via the multifunction steering wheel button groups
- Establish telephone call via voice control system (VCS [SBS])
- Establish telephone call via navigation mode
- Establish telephone call in handsfree mode
- Terminating a telephone call

Establish and terminate telephone call via the buttons on the mobile phone
On a mobile phone operated via Bluetooth(R), the control signals of the mobile phone buttons are internally processed and 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.

In "Private Mode" the user makes a telephone call without other vehicle occupants being able to take part in the conversation, i.e. voice input takes place via the microphone integrated in the mobile phone, and voice output takes place via the speaker integrated in the mobile phone.

Pressing the "END" button on the mobile phone terminates the telephone call (also in hands-free mode). 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.

Establish and terminate telephone call via the Audio/COMAND control panel, telephone buttons or keypad at COMAND controller unit
The "telephone (TEL)" base function is called up using the Audio/ COMAND control panel or the keypad via the "TEL" menu item in the application bar, or with the "TEL" hardkey at the COMAND controller unit. The "Telephone (TEL)" base function is shown on the Audio/ COMAND display. The following ways of dialing a telephone number are now available to the user:
- Directly enter telephone number with keypad on COMAND control unit or with audio/COMAND control panel and character bar on audio/COMAND display
- Search for the telephone number using the "Address book" menu entry in the address book
- Search for the telephone number using the "Call lists" menu entry in the call lists (accepted, dialed)

The name of the person who you wish to call can be selected in the address book and the call lists by scrolling up and down.

After dialing the telephone number via the telephone buttons on the COMAND controller unit and pressing the "Accept phone call" button or by selecting the telephone function via the keypad on the COMAND controller unit and then activating the "TRANSMIT" function, the telephone call is established in hands-free mode (see function sequence "Establish telephone call in hands-free mode"). The telephone call is terminated by pressing the "END" button on the COMAND controller unit or by activating the "END" function in the "Telephone (TEL)" base function.

The control signals from the telephone buttons or the keypad on the COMAND controller unit are processed internally. The control signals from the Audio/COMAND control panel are forwarded via telematics CAN (CAN A) to the COMAND controller unit. The menu item is shown on the Audio/COMAND display via a low voltage differential signal (LVDS) line.

Establish and terminate telephone call via the multifunction steering wheel button groups
The address book of the COMAND controller unit is selected by pressing the system selection (S110s3) button via the selection menu in the instrument cluster.

Scrolling forward and back in the address book of the COMAND controller unit using the scroll forward/back button (S110s1) enables the name of the party being called to be selected. The telephone call is established in hands-free mode with the accept and terminate phone call button (S111s3) (see function sequence "Establish telephone call in hands-free mode").

The telephone call can then be terminated again using the accept and terminate phone call button.

The control signals of the multifunction steering wheel button groups 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

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

Establish telephone call via voice control system (VCS [SBS])
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 control signals of the VCS [SBS] on 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

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

The signal for the signal sound is sent by the COMAND controller unit via direct lines to 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)

Once the VCS has been activated, a telephone number can be searched for and dialed using different voice commands. The voice commands are sensed by the hands-free system microphone and relayed to the COMAND control unit via a direct line.

The telephone call is established in handsfree mode using the voice control of the VCS [SBS] (see function sequence "Establishing a telephone call in handsfree mode").

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

Establishing a telephone call via navigation mode
If a telephone number is stored when entering a point of interest (POI), the user can select it using the keypad on the COMAND controller unit or via the voice control of the VCS [SBS]. The telephone call is established in handsfree mode (see function sequence "Establishing a telephone call in handsfree mode"). The control signals from the keypad at the COMAND controller unit are processed internally.

The signals of the VCS [SBS] are transferred to the COMAND controller unit via the same route as for the function sequence "Establish telephone call via VCS [SBS]".

Establish telephone call in hands-free mode
After the telephone call has been established, the COMAND controller unit transmits the mobile phone signals or data to the mobile phone via the following route:
- Direct line
- Bluetooth antenna

The mobile phone signals and data are received by the mobile phone via the reverse 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 voice output is transmitted by the COMAND control unit to the speaker system via direct lines.

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

Terminating a telephone call
After terminating a telephone conversation, the COMAND controller unit discontinues transmission or reception of the mobile phone signals and data in a control unit-internal procedure, except when a telephone 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.

Function requirements for accepting, rejecting and control of call waiting
- Mobile phone and COMAND controller unit are switched on

Accepting, rejecting a call and control of call waiting
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.

Acceptance or rejection of a call is possible with the following components:
- Buttons on the mobile phone
- Audio/COMAND control panel
- Telephone buttons or keypad on COMAND controller unit
- Multifunction steering wheel button groups

The subfunction consists of the following processes:
- Call signal
- Call acceptance or rejection via the buttons on the mobile phone
- Call acceptance or rejection via the Audio/COMAND control panel, telephone buttons or keypad at COMAND controller unit
- Call acceptance and rejection via the multifunction steering wheel button groups
- Call switching control

Call signal
The mobile phone 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
- Direct line

The COMAND control unit outputs the call sound to the speaker system via direct lines.

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. In addition, the call identification is shown by the COMAND controller unit via the interior CAN on the multifunction display (A1p13) in the instrument cluster.

Call acceptance or rejection via the buttons on the mobile phone
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:
- Bluetooth antenna
- Direct line

Call acceptance or rejection via the Audio/COMAND control panel, telephone buttons or keypad at COMAND controller unit
By pressing the "Accept phone call" button, the call is accepted in hands-free mode, or by selecting the "Accept" function in the "telephone (TEL)" base function (with the Audio/COMAND control panel or via the keypad at the COMAND controller unit). When the "End" button is pressed once or the "Accept" function is selected in the "Telephone (TEL)" base function, the call is held. The call is rejected by pressing the "End" button twice on the audio equipment or by activating the "Reject" button function the "Telephone (Tel)" base function. The control signals from the telephone buttons or the keypad on the COMAND controller unit are processed internally. The control signals from the Audio/COMAND control panel are forwarded via telematics CAN to the COMAND controller unit.

Call acceptance and rejection via the multifunction steering wheel button groups
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 to the COMAND controller unit via the following route:
- Direct line
- Steering wheel electronics
- Steering LIN
- Steering column tube module
- Chassis CAN
- Instrument cluster
- Interior CAN

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 call can be accepted or rejected using the telephone buttons on the COMAND control unit, the audio/COMAND control panel or accept/terminate phone call buttons on right multifunction steering button group.

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 accept/end phone call button are relayed to the COMAND control unit via the following components:
- Direct line
- Steering wheel electronics
- Steering LIN
- Steering column tube module control unit
- Chassis CAN
- Instrument cluster
- Interior CAN

Electronic mail (email)
The Email application enables the user to manage his/her emails (e.g. to read or compose). Emails can only be composed, read and sent via the COMAND controller unit, the Audio/COMAND control panel and the Audio/COMAND display.

The Email function consists of the following component functions:
- Receive and read emails function sequence
- Compose and send emails function sequence

Receive and read emails function sequence
Incoming emails are received by the COMAND controller unit via the following route:
- Bluetooth antenna
- Direct line

The emails can now be shown on the Audio/COMAND display by calling up the Email menu item in the Telephone (ComTel) base function via the TEL hardkey at the COMAND controller unit. The emails can also be shown on the Audio/COMAND display by selecting the ComTel menu item in the application bar with the Audio/COMAND control panel. 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 Email menu item and the selected email are shown on the Audio/COMAND display by the COMAND controller unit via an LVDS line.

Compose and send emails function sequence
Emails can only be written and sent via the Audio/COMAND control panel and the Audio/COMAND display in the Email menu item in the basic telephone (ComTel) function of the Audio/COMAND display.

The Email menu item in the basic telephone (ComTel) function is selected using the TEL hardkey on the COMAND controller unit or via 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 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 Email menu item and the composed email are shown on the Audio/COMAND display by the COMAND controller unit via an LVDS line.

Emails are then sent to the receiver by the COMAND controller unit via the following route:
- Direct line
- Bluetooth antenna

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

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

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 transferred into the address book from an SD card via the Secure Digital (SD) card slot at the COMAND controller unit. These data are then permanently available as address entries.

Address-relevant mobile phone system applications can be directly started and supplied with the stored data via address book entries.

Address entries can contain the following:
- Names (surname and first name)
- "Yomigana field" (for phonetic entry of the name in "Katakana" syllabary)
- Postal addresses (private or business)
- Telephone numbers (private, business, fixed line network, mobile or car)
- Company name
- Geo position
- Notes

A total of 150 entries with voice commands (voice tags) is available for the voice control system. The call can be established via the VCS [SBS] for each entry with a completed "Yomigana field". The address entries stored in the COMAND controller unit are shown in the address book. Read access to the phone book of the mobile phone is provided if the mobile phone supports the Bluetooth(R) Phonebook Access Profile (PBAP).

"Private mode"
When in "Private mode", the user can make a telephone call without other vehicle occupants being able to hear the conversation. When dialing using the buttons on the mobile phone, the telephone call is carried out in "Private Mode" if the mobile phone supports "Private Mode" and "Private Mode" has been activated.

After accepting or establishing a phone call in hands-free mode, it is possible to switch to "private mode" by activating "private mode" via the mobile phone.

"Seamless Switch"
"Seamless Switch" provides the following functionality:
- An existing telephone conversation can be continued in hands-free mode (e.g. when getting into the vehicle) if the COMAND controller unit is switched on and "Private mode" is not activated on the mobile phone.
- An existing telephone conversation can be continued on the mobile phone if the COMAND controller unit is switched off.

With some Japanese mobile phones you can select how the mobile phone behaves if a connection is interrupted. If the "Switch off if connection is interrupted" setting has been selected, "Seamless Switch" cannot be activated because a brief connection interruption occurs.





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