Telematics Services Function - GF82.85-P-2060RRA
Model 190 up to 11/30/18
up to model year 2019
With Code 362 (HERMES communications module LTE)
Except Code 360 (HERMES UMTS)
General telematics services function requirements
For some services, the status of circuit 15 is taken into consideration. The electronic ignition lock control unit transmits the signal via the following route:
- Circuit 30
- Transport mode not active
- The HERMES control unit is configured at the factory with the telephone number for the corresponding service provider.
- The vehicle owner is registered and authorized at the Service Center.
- Each service is authorized separately.
General telematics services
At the vehicle side, the telematics services are realized by the HERMES control unit via a cellular telephone system connection to the Service Center. The HERMES control unit sends and receives the mobile phone signals over the emergency call system antenna or over the telephone antenna splitter and the left telephone antenna, right telephone antenna.
The emergency call system antenna and the left telephone antenna, right telephone antenna are used simultaneously and form a transmission and reception diversity.
Chassis CAN 1 →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
The telematics services function encompasses the following subfunctions:
- Overview of telematics services up to 31.05.2018
- Overview of telematics services as of 01.06.2018
- Voice connection between vehicle and Service Center
- Position finding
- Forwarding of vehicle data, display messages, data queries and operating requests
Overview of telematics services up to 31.05.2018
The following services, e.g. are available:
- Tracking and notification in the event of anti-theft warning:
When the vehicle is parked an ATA [EDW] alarm is notified to the vehicle owner through the service center. In such an instance, or if the owner notices the theft of the vehicle by other means, the vehicle owner can contact the police and report the theft. The vehicle owner receives a special number from the police, which confirms that the vehicle theft has been reported. With this number, the vehicle owner can contact the Service Center by telephone, which then initiates the position finding procedure. The Service Center forwards the location of the vehicle to the responsible command staff (e.g. police).
Vehicle tracking can only be deactivated by the Service Center.
- Breakdown Management:
When the breakdown assistance button is pressed, a voice connection is set-up to the Service Center, so that in the event of a defect on the vehicle, assistance can be implemented quickly and efficiently.
- MB-Info:
By pressing the MB-Info button, the user can call up information on products from the Mercedes-Benz brand in addition to other voice-based services (e.g. booking a hotel) via a voice connection.
- Remote closing and opening of the doors:
The HERMES control unit receives the customer query from the Service Center and forwards it over the diagnostic CAN, front SAM control unit with fuse and relay module and chassis CAN 1 to the electronic ignition lock control unit. The electronic ignition lock control unit checks whether locking or unlocking of all vehicle doors and the liftgate is possible, performs the locking or unlocking (if possible), and reports the locking status back to the HERMES control unit.
- Remote diagnosis:
Diagnostic data are sent automatically (via scripts, for evaluation) and also manually as part of a breakdown assistance procedure. The manual remote diagnosis is triggered by the Service Center and confirmed by the user. As soon as the diagnostic data has been transmitted, the Service Center restores the voice connection to the vehicle.
- Transmission of vehicle position ("Vehicle Locator"):
This service allows the user to determine where the vehicle is currently located. The user receives the vehicle location either in the form of a map display (web page or iPhone), an SMS or by e-mail from the Service Center.
- Notification of a certain speed being exceeded ("Speed Alert"):
As soon as the service is activated, the HERMES control unit reads in the speed value from the diagnostic CAN at intervals of no more than 5 seconds with circuit 15 ON and sends a message to the user if the determined value is exceeded.
- Notification if a certain area has been arrived at or exited ("Geo Fencing"):
The user can determine areas for the vehicle about which, when arrived at or exited, he/she is notified via an SMS, email or automatic phone call.
- Transmission of information (e.g. map data) to the vehicle ("Remote Information Feed"):
Appropriate information is transferred to the vehicle via the Internet (e.g. Google Maps, Yahoo) or the Service Center. With circuit 15 OFF, the HERMES control unit stores the received data in a buffer. At circuit 15 ON, the HERMES control unit forwards the received data to the audio equipment, as soon as it is switched on.
- Transmission of updates to vehicle ("Remote Update"):
The software of the HERMES control unit is updated without the user having to visit a workshop. The software is not updated immediately after transmission, but only 15 min. after circuit 15 OFF.
Remote Start: Using the cellular telephone system connection to the Service Center, the HERMES control unit also receives the triggering signal for the "Remote Start" function (for pre-entry climate control). The "Remote Start" function starts the engine on a parked and locked vehicle (windows and doors closed), and after a limited period it switches it off again, to enable the "Load Mode" to achieve a pre-entry climate control of the A/C system. The HERMES control unit forwards the trigger signal over the diagnostic CAN, front SAM control unit with fuse and relay module and chassis CAN 1 to the electronic ignition lock control unit.
- Visual and acoustic vehicle recognition ("Flash Lights and Sound Horn"):
The visual and acoustic vehicle recognition makes it easier to find your own vehicle if it is outside the range of the transmitter key. The message to activate or terminate the panic alarm is forwarded by the HERMES control unit over the diagnostic CAN to the front SAM control unit with fuse and relay module.
Overview of telematics services as of 01.06.2018
The following services, e.g. are available:
- Remote closing and opening of the doors:
The HERMES control unit forwards the query over the diagnostic CAN, front SAM control unit with fuse and relay module and chassis CAN 1 to the electronic ignition lock control unit. The electronic ignition lock control unit checks whether locking or unlocking of all vehicle doors and the liftgate is possible, performs the locking or unlocking (if possible), and reports the locking status back to the HERMES control unit.
- Vehicle status remote query:
Vehicle data such as the status of the doors and the fuel level can be retrieved on-line.
- Vehicle position:
The customer can locate the vehicle within an area of 1.5 km using the smartphone; this makes it easier to find the vehicle, e.g. in large parking lots or in unfamiliar cities.
- Vehicle locating:
The customer is informed on-line of the current vehicle position by transferring geo-coordinates; the activation of this function is indicated in the vehicle by an icon on the Audio/COMAND display and can be ended from within the vehicle by calling the Service Center.
- Geographical vehicle monitoring:
The customer is informed on-line as soon as his/her vehicle leaves or arrives at an area marked by the customer; the activation of this function is indicated in the vehicle by an icon on the Audio/COMAND display and can be ended from within the vehicle by calling the Service Center.
Additional function requirements for voice connection between vehicle and Service Center
- No higher-priority service (e.g. automatic or manual emergency call) is active.
Voice connection between vehicle and Service Center
The voice connection function between the vehicle and the Service Center is split up into the following subfunctions:
- Activation of voice connection through breakdown assistance button or MB-Info button (With Code 494 (USA version))
- Selection of "MB-Contact" telephone book entry (Except Code 494 (USA version))
- Mute function
- Hands-free
- Termination of the voice connection
- Prioritization
Activation of voice connection through breakdown assistance button or MB-Info button (With Code 494 (USA version))
After the breakdown assistance button or the MB-Info button is pressed, the HERMES Control unit establishes a voice connection to the Service Center. The breakdown assistance button or the MB-Info button sends the control signal over a direct line to the HERMES control unit.
As long as the MB-Info call or the breakdown assistance is activated, the light-emitting diode integrated in the button flashes; for this, the HERMES control unit actuates the breakdown assistance button or the MB-Info button in the opposite way. This is also indicated in the instrument cluster and on the audio/COMAND display.
Parallel to establishing the voice connection, a data telegram is sent to the Mercedes-Benz Service Center that contains the following data, for example: timestamp, GPS position (global navigation system), language set at the head unit, vehicle identification number.
The setup of a voice connection to the Mercedes-Benz Service Center is aborted after several unsuccessful dialing attempts, and a corresponding message appears on the Audio/COMAND display.
The Service Center can perform a remote diagnosis if necessary.
The Service Center can transmit map data to the vehicle if necessary. The data is made available to the navigation module of the audio equipment.
Selection of "MB-Contact" telephone book entry (Except Code 494 (USA version))
The permanently reserved telephone book entry "MB-Contact" can be selected using the head unit.
If the "MB Contact" telephone book entry was selected, the head unit sends a prompt to set up a voice connection as follows:
User interface CAN →
AMG gateway control unit →
Diagnostic CAN →
HERMES control unit
The setup of a voice connection to the Mercedes-Benz Service Center is aborted after several unsuccessful dialing attempts, and a corresponding message appears on the Audio/COMAND display.
The Service Center can perform a remote diagnosis if necessary.
The HERMES control unit establishes a voice connection to the Service Center via the emergency call system antenna and transmits vehicle data.
Parallel to establishing the voice connection, a data telegram is sent to the Mercedes-Benz Service Center that contains the following data, for example: timestamp, GPS position (global navigation system), language set at the head unit, vehicle identification number.
Mute function
When a voice connection is set up, the HERMES control unit sends a signal for muting the audio sources via a direct line to the following components, which actuate the speaker system:
- Sound system amplifier control unit (with code 810 (Sound system)) or Advanced sound system amplifier control unit (with code 811 (Advanced Sound-System))
- Head unit (except CODE 810 (Sound system) and except CODE 811 (Advanced Sound System))
Hands-free
The hands-free system is not available for telephone calls for the duration of the voice connection.
After a data telegram has been transmitted to the Mercedes-Benz Service Center, the user can speak to a service receptionist via the voice connection. The Mercedes-Benz Service Center carries out the call, where possible, in the language that was selected in the system settings of the audio equipment and transmitted in the data telegram.
The HERMES control unit receives outgoing voice signals from the driver hands-free system microphone via the head unit.
The HERMES control unit emits the incoming voice signals via the center instrument panel mid-range speaker (with code 810 (Sound system) or with code 811 (Advanced Sound System)) or via the emergency call speaker (except code 810 (Sound system) and except code 811 (Advanced Sound System)).
The voice output volume can be adjusted using the + and - button, setting of specific functions and the volume control of the right multifunction steering wheel button group. The right multifunction steering wheel button group sends the control signals via the following route:
Steering wheel electronics →
Steering LIN →
Steering column tube module control unit →
Chassis CAN 1 →
AMG gateway control unit →
Diagnostic CAN →
HERMES control unit
Termination of the voice connection
The Accept/terminate phone call button of the right multifunction steering wheel button group can be used to end the voice connection, if this is not done by the Mercedes-Benz Service Center. The right multifunction steering wheel button group sends the control signals via the following route:
Steering wheel electronics →
Steering LIN →
Steering column tube module control unit →
Chassis CAN 1 →
AMG gateway control unit →
Diagnostic CAN →
HERMES control unit
Prioritization
For the services that require a voice connection between the vehicle and the Service Center, the prioritization shown below is valid.
Telematics services, e.g. accident management, can also be triggered by the Service Center after an emergency call with the customer's consent. In this case, the voice connection that was set up for the emergency call is used again by means of transferring within the Service Center. The emergency call is then converted into a service with lower priority.
| Priority | Service |
|---|---|
| 1 | Automatic emergency call |
| 2 | Manual emergency call |
| 3 | Breakdown Management |
| 4 | MB Info |
Position finding
The HERMES control unit receives the position finding signals from the head unit. The head unit sends the signals over a USB line (Universal Serial Bus) to the HERMES control unit.
Forwarding of vehicle data, display messages, data queries and operating requests
The HERMES control unit forwards the data, data queries and operating requests that have been received via the cellular telephone system connection to the Service Center via diagnostic CAN to the front SAM control unit with fuse and relay module, where they are further distributed in accordance with the respective requirements. The HERMES control unit receives vehicle data over the diagnostic CAN from the front SAM control unit with fuse and relay module and forwards this data as well as the position finding from the head unit as requested over the emergency call system antenna or the telephone antenna splitter and the left telephone antenna, right telephone antenna to the Service Center.
The content shown on the Audio/COMAND display (e.g. pop-up windows, vehicle locating symbol, field strength) is sent by the HERMES control unit over the following path:
Diagnostic CAN →
Front SAM control unit with fuse and relay module →
Chassis CAN 2 →
AMG gateway control unit →
User interface CAN →
Head unit →
LVDS line →
Audio/COMAND display
The control communication (e.g. switch on) is sent by the head unit to the Audio/COMAND display via telematics CAN.
Some messages on the Audio/COMAND display can be confirmed using the Audio/COMAND control panel or the touchpad (with code 448 (Touchpad) or with code 531 (COMAND APS)). The Audio/COMAND control panel or the touchpad (with code 448 (Touchpad) or with code 531 (COMAND APS)) sends the signals over the following route:
Telematics CAN →
Head unit →
User interface CAN →
AMG gateway control unit →
Chassis CAN 2 →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
| Electrical function schematic for telematics services function | PE82.95-P-2074-97HBC | ||
| Overview of system components, telematics | GF82.85-P-9999RR |