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Mercedes-Benz Contact, function - GF82.70-P-2019G

MODEL 463.306 /336 /346 up to 31.5.12 except CODE (ZJ1) Japan version as of Model Year 2011 /YoM 10 

MODEL 463.202 /222 /236 /237 /270 /271 /303 /340 /341 up to 31.5.12 except CODE (ZJ1) Japan version as of Model Year 2009/YoM 08 

Shown on model 463.236 

Fig 1: Mercedes-Benz Contact Function Diagram
G07891411Courtesy of MERCEDES-BENZ USA

IMPORTANT Depending on the equipment installed one of the following control units will be installed, hereafter referred to as the "audio unit":

Function requirements, general 

IMPORTANT So that a bluetooth-capable mobile phone that is authorized on the audio equipment can be operated in the vehicle, the mobile phone must support the hands-free profile (HFP) 1.0 or 1.5. More information is available under:

IMPORTANT The entries in either of the two "books" below are always available; they can only be removed by deleting:

IMPORTANT With basic telephony, without code (EH2) Comfort telephony, it is possible to gain read access to the telephone book of the mobile phone if the mobile phone supports the Bluetooth profile Phonebook Access Profile (PBAP). Otherwise, the entries in the mobile phone's phone book can only be transmitted to the audio equipment via "vCards".

Mercedes-Benz Contact, general 

The "Mercedes-Benz Contact" function provides user-friendly access to the services provided 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 equipment 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:

The system is described using comfort telephony as an example, with code (EH2) Comfort telephony. Differences from the basic telephony are marked by the symbolIMPORTANT .

Operating instructions 

The fixed, reserved telephone book entry in the telephone book or in the address book of the "audio unit" or in the telephone book of the mobile phone is selected via one of the following components:

The data is transferred after an active telephone call by actuating a number key on the keypad of the "audio unit".

Selecting fixed, reserved telephone book entry function sequence via the buttons on the mobile phone 

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.

Selecting fixed, reserved telephone book entry function sequence via the telephone buttons or the keypad on the audio equipment 

After dialing the fixed, reserved telephone book entry using the telephone buttons on the audio equipment and pressing the "Accept phone call" button or by selecting the telephone function using the keypad on the audio equipment and then activating the "SEND" function, the telephone call is established in hands-free mode.

The "Telephone (Tel)" base function is activated via the "Tel" hardkey on the audio equipment or the "Tel" menu item in the application bar using the keypad on the audio equipment and then shown in the display of the audio equipment.

Here, the user has the following options of selecting the fixed, reserved telephone book entry:

The fixed, reserved telephone book entry can be selected in the telephone book or address book and in the call lists by scrolling up and down. The control signals of the telephone keys or the keypad on the audio unit are processed internally. The display of the menu item on the display of the audio equipment also takes place internally.

Selecting fixed, reserved telephone book entry function sequence via the multifunction steering wheel button group 

The telephone book or the address book is selected by pressing the system selection (S110s3) button via the selection menu in the instrument cluster. The fixed, reserved telephone book entry is selected by scrolling forward and back in the address book or the telephone book of the mobile phone using the scroll forward and back (S110s1) key.

The accept/terminate phone call button (S111s3) can be used to establish the telephone call in the hands-free system.

The control signals of the multifunction steering wheel button groups are forwarded to the audio equipment via the following components:

Communication between the "audio unit" and the mobile phone is conducted via:

The display in the instrument cluster is performed by the audio equipment via interior CAN.

IMPORTANT Communication with the basic telephony takes place between the "audio unit" and the mobile phone in the following way:

Function sequence, select fixed, reserved telephone book entry via VCS [SBS] (with code (EU1) COMAND, APS) 

The voice control is activated by pressing the VCS [SBS] switch. The control signal from the VCS [SBS] switch is forwarded to the audio equipment via the following components:

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

In vehicles with code (EU9) Surround sound system (harman/ kardon Logic 7), the signal tone is transmitted by the audio equipment to the sound system amplifier via MOST. From there, the signal tone is transmitted via direct lines to the following speakers:

IMPORTANT In vehicles without code (EU9) Surround sound system (harman/kardon Logic 7), the signal tone is transmitted directly from the audio equipment via direct lines to the following speakers:

Establishing a call is activated in the dialog with the VCS [SBS] with the help of voice commands, e.g.:

The voice commands are registered by the hands-free system microphone group and forwarded via a direct line to the audio equipment.

The voice control of the voice control system (VCS [SBS]) is used to establish the telephone call in the 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:

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 keys or the keypad on the audio equipment are processed internally.

For data transfer purposes, the audio equipment checks the kilometer reading and the maintenance computer information of the instrument cluster via the interior CAN.

In vehicles with code (EU1) COMAND, APS, the navigation data is also transmitted by the navigation module integrated into the audio equipment.

The data is transmitted by the audio equipment by means of Dual Tone Multiple Frequency (DTMF) tones 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 hands- free system microphone group and forwarded via a direct line to the audio equipment.

In vehicles with code (EU9) Surround sound system (harman/ kardon Logic 7), the voice output is transmitted by the audio equipment to the sound system amplifier via MOST. From there, the voice output is transmitted via direct lines to the following speakers:

IMPORTANT In vehicles without code (EU9) Surround sound system (harman/kardon Logic 7), the voice output is transmitted directly from the audio equipment via direct lines to the following speakers:

IMPORTANT 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 UPCI [UHI] cell phone holder.

IMPORTANT For basic telephony, the "audio unit" receives or transmits the mobile phone signals or data in the following way:

Terminate call function sequence using mobile phone buttons 

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.

Terminate call function sequence over telephone buttons or keypad on audio equipment 

The telephone call is terminated by pressing the "END" button on the audio equipment or by activating the "END" function in the "Telephone (Tel)" base function. The control signals of the telephone keys or the keypad on the audio unit are processed internally.

Function sequence, terminate call using 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:

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".

  Component description for instrument cluster A1 GF54.30-P-6000G
  Radio control panel, component description A2
With code (EF5) MB audio 20 CD radio, (NTG 2.5)		 GF82.60-P-3116G
  Component description for COMAND operating, display and controller unit A40/3
With code (EU1) COMAND, APS		 GF82.85-P-3134GB
  Component description for sound system amplifier N40/9
With code (EU9) Surround sound system (harman/kardon Logic 7)		 GF82.62-P-6003G
  Electronic ignition/starter switch control unit (EZS), component description N73 GF80.57-P-6000G
  Component description for steering column tube module N80 GF54.21-P-6050G
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