GF82.70-P-2019CE Mercedes-Benz Contact, Function

GF82.70-P-2019CE Mercedes-Benz Contact, Function
- with CODE (386) Mobile phone
- 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
- except CODE (494) USA 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)

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

The entries in either of the two "books" below are always available; they can only be removed by deleting:
- Telephone book (with code (523) Radio MB Audio 20 or with code (510) Audio 20 incl. CD changer)
- Address book (with code (525) Radio MB Audio 50 APS or 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)

With the basic telephony, it is possible to gain read access to the telephone book of the mobile phone, if the mobile phone supports the Bluetooth profile Phone Book Access Profile (PBAP).

Otherwise, the entries in the telephone book of the mobile phone can only be transmitted to the "audio unit" via "vCards".

The fixed, reserved telephone book entry in the address book of the "audio unit" or in the telephone book of the audio equipment is selected via one of the following components:
- 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) (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 data is transferred after an active telephone call by actuating a number key on the keypad of the "audio unit".

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).

Mercedes-Benz Contact, general
The "Mercedes-Benz Contact" function provides user-friendly access to the services rendered by Mercedes-Benz Services by means of a fixed, reserved telephone book entry in the telephone book or in the address book of the "audio unit" or the telephone book of the mobile phone. The "Mercedes-Benz Contact" function utilizes the handsfree system (via Bluetooth) and supports the service acceptance process in the service center or, at a later point in time, in the workshop as well, by switching to voice output and synchronously transmitting vehicle data. The "Mercedes-Benz Contact" function consists of the following subfunctions:
^ Function sequence for selection via buttons on mobile phone (basic telephony)
^ Function sequence for selecting via telephone buttons on audio equipment
^ Function sequence for selecting via Audio/COMAND control panel
^ Function sequence for selecting via multifunction steering wheel button groups
^ Function sequence for selecting 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)
^ Establish telephone call in handsfree mode and transmit data to the service center function sequence
^ Function sequence for terminating call via buttons on mobile phone (basic telephony)
^ Function sequence for terminating call via telephone buttons on audio equipment
^ Terminate call function sequence via Audio/COMAND control panel
^ Terminate call function sequence over multifunction steering wheel button groups
^ Terminate call function sequence via the service center
^ Terminate telephone call function sequence in handsfree mode with the service center

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

Function sequence for selection via buttons on mobile phone (basic telephony)
The fixed, reserved telephone book entry is selected via the buttons on the mobile phone or from the mobile phone's phone book. The "Accept phone call" button is pressed. The telephone call is then established in handsfree mode. The control signals from the buttons on the mobile phone are processed internally in the mobile phone.

Function sequence for selecting via telephone buttons on audio equipment
After dialing the permanently reserved phone book entry using the telephone buttons on the "audio equipment" and pressing the "Accept phone call" button, the phone call is established in hands-free mode. The control signals from the telephone buttons on the "audio unit" are processed internally.

Function sequence for selecting via Audio/COMAND control panel
The basic "TEL" function is activated using the TEL hardkey on the "audio equipment" or the "Tel" menu item in the application bar on the Audio/COMAND display via the Audio/COMAND control panel and then shown on the Audio/COMAND display. The control signals from the TEL hardkey on the "audio equipment" are processed internally. The control signals from the Audio/COMAND control panel are forwarded to the "audio equipment" via the telematics CAN.
The menu item is shown on the Audio/COMAND display by the "audio equipment" via a low voltage differential signal (LVDS) line. The user now has the following options for selecting the permanently reserved phone book entry:
- Enter telephone number using speller offered
- Search telephone number over menu entry "NAME"
- Search telephone number over menu entry "Address book"
- Search telephone number over menu entry "Call lists" (incoming or dialed)

Activation of the "SEND" function on the Audio/COMAND display establishes the telephone call in hands-free mode.
The control signals from the Audio/COMAND control panel are forwarded to the "audio equipment" via the telematics CAN.

The user can scroll forward and back in the phone book or the address book and in the call lists using the Audio/COMAND control panel to select the permanently reserved phone book entry.

Function sequence for selecting via multifunction steering wheel button groups
The phone book or the address book is selected by pressing the system selection (S110s3) button via the selection menu in the instrument cluster (). The permanently reserved phone book entry can be selected by scrolling forward and back using the scroll forward and back button (S110s1).
The accept/terminate phone call button (S111s3) can be used to establish the telephone call in the handsfree system.

The control signals of the multifunction steering wheel button groups are forwarded to the "audio unit" via the following components:
- Direct line
- Steering wheel electronics (N135)
- Steering LIN (LIN E1)
- Steering column module control unit (N80)
- Chassis CAN (CAN E)
- Instrument cluster
- Interior CAN (CAN B)

Communication between the "audio unit" and the mobile phone is conducted via:
- Direct line
- Bluetooth antenna (A2/91)
- Bluetooth module
- Cradle

Communication with the basic telephony takes place between the "audio unit" and the mobile phone in the following way:
- Direct line
- Bluetooth antenna
- Mobile phone antenna

Function sequence for selecting 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 from the VCS [SBS] on button is forwarded to the "audio unit" via the following components:
- Direct line
- Steering wheel electronics
- Steering LIN
- Steering column module control unit
- Chassis CAN
- Instrument cluster
- Interior CAN

A signal tone is emitted after the voice control system has been activated. The signal tone is output by the audio equipment via the speaker system.

The call is established in dialogue with the voice control system using voice commands, such as the following:
- "Dial number"
- "Redial"
- "Read telephone book"
- "Open or spell entries"
- "Landline or mobile"
- "Dial"

The voice commands are recorded by the voice control system microphone (B25/7) and forwarded via a direct line to the "audio equipment".
The telephone call is then established in hands-free mode.

Establish telephone call in handsfree mode and transmit data to the service center function sequence
When the call has been established successfully, the "audio unit" transmits or receives the mobile phone signals or data in the following way:
- Direct line
- Bluetooth antenna
- Bluetooth module
- Direct line and multifunction antenna (A28/11) (with code (386) Mobile phone without code (228) Stationary heater)
- Coaxial cable via antenna amplifier/cellular telephone system compensator (A28/3), mobile phone and stationary heater radio remote control antenna splitter (A2/53) and multifunction antenna (with code (386) Mobile phone and code (228) Stationary heater)

After an active call has been established to the service center, the user starts the data transfer. The data is transferred after the call has been established by actuating a number key on the keypad of the "audio unit". The control signals from the telephone buttons on the "audio unit" are processed internally.

For data transfer purposes, the "audio equipment" checks the kilometer reading and the maintenance computer information on the instrument cluster via the interior CAN.
On vehicles with code (511) Audio 50 APS incl. DVD changer or code (525) Radio MB Audio 50 APS or code (527) COMAND APS with single DVD drive (with navigation) or code (512) COMAND APS incl. DVD changer, the navigation data is also sent by the navigation module integrated into the "audio equipment". The data is transmitted by the audio equipment to the service center in the same way as when the call has been established successfully. After the data has been transferred to the service center, the user can talk to an employee at the service center or the workshop. The transmitted data is then available to the employee. The voice input in hands-free mode is registered by the voice control system microphone and forwarded to the "audio equipment" via a direct line.

When in "private mode" the user can make a telephone call without other vehicle occupants being able to hear the conversation. The system switches to "private mode", when the mobile phone is removed from the cradle.

For basic telephony, the "audio unit" receives or transmits the mobile phone signals or data in the following way:
- Direct line
- Bluetooth antenna
- Mobile phone antenna

Function sequence for terminating call via buttons on mobile phone (basic telephony)
Pressing the "END" button on the mobile phone terminates the telephone 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" terminates the telephone call. The control signals from the telephone buttons are processed internally.

Terminate call function sequence via Audio/COMAND control panel
When the "END" function is activated in the basic telephone (TEL) function on the Audio/COMAND display, the telephone call is terminated. The control signals from the Audio/COMAND control panel are forwarded to the "audio equipment" via the telematics CAN.

Terminate call function sequence over multifunction steering wheel button groups
The accept/terminate phone call button terminates the telephone call. The control signals of the multifunction steering wheel button groups are forwarded to the "audio equipment" via the following components:
- Direct line
- Steering wheel electronics
- Steering LIN
- Steering column module control unit
- Chassis CAN
- Instrument cluster
- Interior CAN

Terminate call function sequence via the service center
The employee in the service center or the workshop can also terminate the telephone call. This procedure will run externally.

Terminate telephone call function sequence in handsfree mode with the service center
After a phone call has been terminated, the "audio unit" interrupts the transmission or reception of the mobile phone signals or data. This takes place internally in the "audio unit".