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

Model 190 as of 12/1/18 

as of model year 2019 

G16682862Courtesy of MERCEDES-BENZ USA

Function requirements, general 

IMPORTANT Model 190 as of 12/1/18

as of model year 2019

with code 17U (Google Automotive Link smartphone integration)

If a smartphone is integrated in the vehicle using Android Auto, telephone calls can only be made via the connected smartphone.

IMPORTANT Additional information available at: http://www.mercedes-benz.com/connect

Mobile telephone system, general 

A differentiation is made between the following equipment and utilization variants in the mobile phone system:

Both versions use Bluetooth® technology for data transfer.

IMPORTANT A mobile phone authorized on the head unit can also be used as a modem to access the Internet.

IMPORTANT A mobile phone authorized on the head unit can also be used as a playback device as part of Bluetooth® audio.

IMPORTANT The mobile phone system is described here using basic telephony as an example. The special considerations for telephony with special equipment are summarized at the end of this document.

The mobile phone system includes the following areas:

Individual telephone functions can also be used via the instrument cluster. The head unit sends the corresponding data over the user interface CAN to the instrument cluster.

Bluetooth® 

Using Bluetooth®, it is possible to quickly and easily connect mobile terminals that support the corresponding profiles to the mobile phone system. Bluetooth® is a worldwide open standard for connecting Bluetooth® devices (e. g. mobile phone) wirelessly and is based on radio technology in the 2.4 GHz range. One advantage of Bluetooth®, in addition to the wide availability of Bluetooth® devices, is the uncomplicated and spontaneous connection of Bluetooth® devices. The extremely high level of data security (128-bit encoding) and the relatively limited radius (approx. 10 m) of this type of Bluetooth® network are what makes the use of Bluetooth® in the vehicle interesting. The head unit can integrate mobile phones into the vehicle hierarchy over the mobile phone's Bluetooth® interface and the Bluetooth® antenna. The head unit automatically searches for the last two connected mobile phones and connects to the mobile phone that responds first.

B If the mobile phone is not automatically connected to the head unit or if the head unit is to be establish a connection to another mobile phone, then the connection must be made manually over the telephone base function. Authorized telephones can be selected from a list. Non-authorized telephones must be authorized first. Up to 15 mobile phones can be authorized at the same time. When authorizing a new telephone if 15 telephones are already authorized, the user is prompted to first delete one of the existing data records. Detailed information on authorization is available in the respective operator's manual.

Switch on/off characteristics 

A mobile phone operated via Bluetooth® is switched on and off on the mobile phone itself. The SIM PIN prompt (subscriber identification module, personal identification number), if configured on the mobile phone and if it is transmitting the status, occurs on the mobile phone only and the PIN has to be entered into the mobile phone. After logging into the mobile telephone network provider's network, the mobile telephone network provider and the signal level are displayed in the status bar of the Audio/COMAND display.

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. The "Ready for Bluetooth® telephony" message appears on the Audio/COMAND display and the system automatically searches again for the mobile phones used most recently.

The right lower control panel transmits the operation signals of the volume adjustment switch and head unit on switch via the following route:

Drive Unit CAN →

Drive Unit control unit →

Audio LIN →

Audio/COMAND control panel (except code 446 (Touchpad only)) or Touchpad (with code 446 (Touchpad only)) →

Telematics CAN →

Head unit

Call signal 

The head unit receives the call signal over the Bluetooth® antenna from the mobile phone. If the mobile phone supports "In-band ringing", the mobile phone ring tone is emitted over the speakers, otherwise the head unit's default ringing sound is used. The head unit transmits the ringing tone to the following components via MOST:

IMPORTANT The head unit mutes the active audio source (e. g., during radio mode) (mute function) and displays the caller ID over the LVDS line on the Audio/COMAND display.

Establish, end, accept, reject or toggle call 

The telephone function is used through the head unit. The head unit generates the display messages and sends them over an HSVL line to the Audio/COMAND display. The head unit transmits control signals to the Audio/COMAND display via the telematics CAN. Telephone numbers can be entered using a character bar on the Audio/COMAND display or they can be searched for and selected in call lists or in the address book. The mobile phone system can be operated using the following components:

Special types of calling, such as toggling phone calls or conference connections, are possible if the mobile phone can process more than one connection at a time.

IMPORTANT Toggle: If during a telephone call another incoming call is received or another telephone connection is set up, then the new call is activated and the existing one put on hold. It is then possible to switch (toggle) between the active call and the one on hold.

IMPORTANT Conference connection: If the mobile phone supports the function, it is possible - after several calls have been connected - to switch, not only between the calls, as for toggling, but to have all the calls active at the same time in a conference connection.

Mobile phone 

The mobile phone control is processed internally, status changes are received by the head unit over the Bluetooth® antenna.

Audio/COMAND control panel (except code 446 (Touchpad only)) 

The Audio/COMAND controller is used to call up and activate the functions in the Telephone menu. The "Back" button supports navigation in the menus.

The Audio/COMAND control panel transmits the control signals via telematics CAN to the head unit.

Touchpad (With Code 446 (Touchpad only) or With Code 531 (COMAND APS)) 

The head unit receives the operation signals from the touchpad over the telematics CAN.

Head unit multifunction steering wheel button group 

The control signals from the head unit multifunction steering wheel button group, including the accept and end phone call button switch, are forwarded as follows:

Steering wheel electronics →

Steering wheel CAN →

Steering column tube module control unit →

AMG FlexRay →

AMG gateway control unit →

User interface CAN →

Head unit

Voice control system (VCS [SBS]) (With Code 531 (COMAND APS)) 

The voice control system is activated on the head unit multifunction steering wheel button group. When a call is being connected or a call being accepted, the voice control system is automatically switched off.

The control signal from the head unit multifunction steering wheel button group is forwarded over the following path:

Steering wheel electronics →

Steering wheel CAN →

Steering column tube module control unit →

AMG FlexRay →

AMG gateway control unit →

User interface CAN →

Head unit

When the voice control system is active, the voice commands are recorded by the driver hands-free system microphone and forwarded over a direct line to the head unit. If necessary, the head unit sends the control signals over the Bluetooth® antenna to the mobile phone.

Using the phone in hands-free mode 

Voice input in hands-free mode is recorded by the driver hands-free system microphone and by the front passenger hands-free system microphone, and forwarded to the head unit. The head unit sends the signals over the Bluetooth® antenna to the mobile phone. The head unit receives incoming voice signals from the mobile phone via the Bluetooth® antenna and forwards them to the following components via MOST:

The volume of the voice outputs can be adjusted using the volume adjustment switch and head unit on switch on the right lower control panel or using the volume adjustment switch of the head unit multifunction steering wheel button group.

The right lower control panel transmits the operation signals of the volume adjustment switch and head unit on switch via the following route:

Drive Unit CAN →

Drive Unit control unit →

Audio LIN →

Audio/COMAND control panel (except code 446 (Touchpad only)) or Touchpad (with code 446 (Touchpad only)) →

Telematics CAN →

Head unit

The head unit multifunction steering wheel button group transmits the operation signals of the volume adjustment switch via the following route:

Steering wheel electronics →

Steering wheel CAN →

Steering column tube module control unit →

AMG FlexRay →

AMG gateway control unit →

User interface CAN →

Head unit

Address book 

Users can manage their contact data in the address book. Viewing, deleting and transferring of address book entries are always possible; editing of address book entries (manually creating, supplementing or changing entries) is only possible in vehicles with CODE 531 (COMAND APS). Address book entries can only be removed by deleting individual entries or by deleting the entire address book. Address book entries that contain telephone numbers are made available to the mobile phone system in the phone book.

Address book entries can contain the following information among other things:

IMPORTANT The call can be established via the voice control system for each entry with a completed "Yomigana field".

The address data of external devices (e.g. Personal Digital Assistant (PDA), notebook) or storage media (e.g. SD card (Secure Digital), USB (Universal Serial Bus) memory) can be saved in the address book and then be permanently available as an address entry. The address data can be sent to the address book via the following system components:

Two phone mode 

In the two phone mode, two mobile phones are connected at the same time to the head unit. The mobile phone selected as the "first telephone" can be used without restrictions through the head unit.

The "second telephone" can use the following functions through the head unit:

The user can switch between the "first telephone" and the "second telephone" using the head unit.

Short Message Service (SMS) (except code 498 (Japan version)) 

The SMS application allows the user to receive, transmit and manage his/her SMS messages (e. g. to read or delete them). For this, the SMS messages previously received on the mobile phone as well as the new SMS messages are forwarded to the head unit. The following SMS functions are possible:

IMPORTANT The SMS function with basic telephony requires the Message Access Profile (MAP) to be supported. Under certain circumstances, loading SMS messages may take a long time. This may be because of the mobile phone or the number of SMS messages in the mobile phone.

As soon as the head unit is connected to the mobile phone, it starts to receive the SMS messages already stored in the mobile phone, and any new incoming SMS messages over the mobile phone's Bluetooth® antenna. The functions for writing, sending and managing SMS messages are activated through the basic telephone function. The head unit displays the SMS messages on the Audio/COMAND Display via the HSVL line. When the SMS is being read out, the head unit sends the audio signals to the following components via MOST:

Telephony With Code 380 (Car telephony package) 

When telephony is used for the first time in the vehicle, the user is asked via a pop-up window on the Audio/COMAND display whether he wants to use the head unit's basic telephony or telephony with code 380 (Car telephony package).

The mobile phone signals are received via the following route:

Left telephone antenna and right telephone antenna →

Telephone antenna splitter →

Telephone control unit

For phone calls, the telephone control unit communicates via various Bluetooth® profile with the head unit. The head unit sends and receives the Bluetooth® signals via the Bluetooth® antenna.

IMPORTANT The telephone control unit supports the SIM Access Profile (SAP), the Hands-Free Profile (HFP), the Message Access Profile (MAP), the Phonebook Access Profile (PBAP) and the Serial Port Profile (SPP).

In the case of a data connection, the telephone control unit communicates via WLAN with the head unit. The head unit sends and receives the WLAN signals via the WLAN antenna.

Telephony with code 380 (Car telephony package) has the following properties:

Switch-on behavior (With Code 380 (Car telephony package)) 

The mobile phone system is automatically switched on by a wake-up pulse when the head unit is switched on. The head unit transmits the signal via the telematics CAN to the telephone control unit.

PIN prompt (With Code 380 (Car telephony package)) 

A prompt for the PIN is shown after switching on the mobile phone if the SIM card is configured for this. The PIN prompt is shown by the head unit over HSVL line on the Audio/COMAND display. The PIN can be entered using the head unit controls. The PIN of a connected telephone or the SIM card can be stored in the telephone control unit so that it does not need to be entered again when switching on.

Use of telephone control unit (With Code 380 (Car telephony package)) 

The telephone control unit can be used for telephony in two different ways:

If an existing connection with a mobile phone is to be replaced with another mobile phone, the existing connection must first be separated and the intended

Mobile phones that are to be used for telephony with the telephone control unit, including integrated telephone module and antenna connection, must be authorized once in the telephone control unit. During an active telephone call on the mobile phone, a SAP connection cannot be established.

In total, up to 14 mobile phones and one SIM card can be authorized in the telephone control unit. After switching on the head unit, the telephone control unit automatically searches for all authorized mobile phones. The first to respond to the request is connected. If a SIM card is inserted into the telephone control unit although a mobile phone is already connected, the inserted SIM card is used and connected for the mobile phone system at the telephony control unit. It is still used for telephony even when the head unit is subsequently switched on.

mobile phone manually connected by selecting it in the device list.

IMPORTANT The telephone control unit is Internet-capable if the mobile phone contract that is used has a data option.

IMPORTANT A ring tone can be selected from a list of ring tones for each SIM card, in the mobile phone or the telephone control unit.

Restrictions on mobile phone (With Code 380 (Car telephony package)) 

As long as the mobile phone for telephony is connected to the telephone control unit via the SIM Access Profile, the telephony function on the mobile phone is rejected and the Internet connection is interrupted. No mail or WhatsApp messages can therefore be received either. The mobile phone is in sleep mode and is off-line.

If e.g. a status update for all messages on the mobile phone is desired, the user can wake the mobile phone, connect to the hotspot of the head unit via WLAN and establish an Internet connection via the head unit.

Additional function requirements: Combination mode (With Code 380 (Car telephony package)) 

IMPORTANT When combination mode is activated, a Bluetooth® connection to the combined mobile phone is established before the telephone control unit connects via the inserted SIM card.

Combination mode (With Code 380 (Car telephony package)) 

When combination mode is activated, the mobile phone system supports the following functions:

The contact data from the logged-in mobile phone are transferred via Bluetooth®.

If both SIM cards are called simultaneously, the SIM card in the telephone control unit is used for telephony. The call on the mobile phone is not shown on the Audio/COMAND display, and is transmitted as a missed call to the telephone control unit via Bluetooth® on renewed connection.

If only the mobile phone is called, the call can be accepted using the mobile phone system.

  Electrical function schematic for mobile phone   PE82.70-P-2051-97HBB
  Overview of system components, telematics   GF82.85-P-9999RR
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