Telematics Services Function - GF82.85-P-2060RRM
Model 190 as of 12/1/18
as of model year 2019
With Code 362 (HERMES communications module LTE)
General telematics services function requirements
- Circuit 30g
- Transport mode is not active.
- The HERMES control unit is configured with the telephone number of the corresponding service provider.
- The user is registered with "Mercedes me", and the vehicle is linked to his account.
- The respective service is authorized (valid subscription) and activated.
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 mobile phone signals over the following antennas:
- Emergency call system antenna
- Left telephone antenna, right telephone antenna and telephone antenna splitter
All antennas are used at the same time to achieve transmission and reception diversity.
The telematics services function encompasses the following subfunctions:
- Overview of the basic telematics services
- Overview of additional telematics services
- Voice connection between vehicle and Service Center
- Position finding
- Forwarding of data, data requests, display messages and operating requests
The emergency call, the Internet connection and the transfer of real-time traffic data are described elsewhere in detail.
The vehicle owner can use the Internet site https://www.me.mercedes-benz.com or the MB-App "Mercedes me" to conjure and activate the Mercedes me Portal services.
Overview of the basic telematics services
The following services, e.g. are available:
- Maintenance management:
If the customer has taken out a service and maintenance contract, vehicle data is transmitted via the Service Center to the service partner if necessary; the service partner then notifies the user that service is required via the medium selected by the user (e.g. "MyMercedes", e-mail, telephone). If the customer has not taken out a service and maintenance contract, a pop-up window appears on the Audio/COMAND display 5 days before the calculated service due, asking whether a connection to the customer center should be set up. If the user selects "Call now", a voice connection to the Service Center is set up. If the user selects "Call later", the pop-up window is displayed again later. If the user selects "No, thank you", no pop-up window is displayed when the service is due.
- Telediagnosis:
The condition of wear parts (e.g. brake disks) is monitored and transmitted via the Service Center to the service partner if necessary; the service partner then notifies the user that the wear parts require replacement via the medium selected by the user (e.g. "MyMercedes", e-mail, telephone).
- Accident management:
The user can request technical assistance via a voice connection after an accident.
- Breakdown management:
The user can request technical assistance via a voice connection. With the consent of the user, vehicle data can be sent to enable faster and more effective assistance to be rendered.
Overview of additional telematics services
The following telematics services are possible, e.g.:
- Concierge service:
The MB Contact address book entry can be used to obtain information via a voice connection (e.g. regarding nearby restaurants or share prices) and use other services (e.g. table reservations, hotel room booking).
- Connected navigation:
- Real-time traffic data (with code 367 (Live Traffic Information))
- Car-to-X communication (with code 531 (COMAND APS)): Danger points (e.g. breakdown vehicle, accident, fog, ice) are detected by participating vehicles through the vehicle sensors, and they are automatically sent to the service provider or reported manually by a user. Participating vehicles receive at regular intervals updated information on dangerous areas in the vicinity that are then output acoustically by the head unit and as a pictogram on the navigation map.
- Apps integrated into the navigation mode (with code 531
(COMAND APS)): The weather, local search, parking space finder and gas station prices apps are displayed on the navigation map.
- Online map update over the Universal Serial Bus (USB) (with code 531 (COMAND APS)): The user can download his own map updates on the Internet and, e.g. store them on a USB flash drive through the head unit's multimedia connection unit.
- Online map update over the cellular telephone system connection to Service Center (with code 531 (COMAND APS)): The HERMES control unit receives updates of map data in the background and forwards them to the head unit.
- Satellite images, IP radio, Aupeo! Personal Radio (including chargeable data flat rate)
- Vehicle monitoring (with code 09U (Vehicle monitoring)):
- Vehicle location: The user can locate the vehicle within a radius of 1.5 km with his smartphone; this makes it easier to find the vehicle, e.g. in large parking lots or in unfamiliar cities.
- Vehicle locating: The user is informed on-line about the vehicle's current position by means of transmitted geo-coordinates. Activation of this function is indicated in the vehicle by an icon on the Audio/COMAND display and can be terminated by calling the Service Center from the vehicle.
- Geographical vehicle monitoring: The user is informed on-line as soon as his/her vehicle leaves or reaches an area marked by the user. Activation of this function is indicated in the vehicle by an icon on the Audio/COMAND display and can be terminated by calling the Service Center from the vehicle.
- Route planning
- Vehicle setup:
- Remote closing and opening: The doors and trunk lid are locked or opened. The HERMES control unit forwards the query via diagnostic CAN, front SAM control unit with fuse and relay module and interior CAN to the electronic ignition lock control unit. The electronic ignition lock control unit checks whether the locking or unlocking of all vehicle doors and the trunk lid is possible, performs the locking or unlocking if possible and reports the 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.
- Media
- User data synchronization (with code 531 (COMAND APS))
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 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 voice connection function between the vehicle and the Service Center is split up into the following subfunctions:
- Triggering voice connection via the overhead control panel electronics (With Code 494 (USA version))
- Triggering the voice connection via the "MB-Contact" address book entry
- Mute function
- Hands-free
- Termination of the voice connection
- Prioritization
Triggering voice connection via the overhead control panel electronics (With Code 494 (USA version))
The HERMES control unit sets up a voice connection with the Service Center by pressing the breakdown assistance button or the MB-Info button in the overhead control panel electronics. The HERMES control unit reads in the buttons via direct lines.
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.
As long as the voice connection is activated, the light-emitting diode integrated in the relevant button flashes; for this, the HERMES control unit actuates the button via a direct line.
The voice connection is shown on the Audio/COMAND display as follows:
HERMES control unit →
Diagnostic CAN →
Front SAM control unit with fuse and relay module →
Interior CAN →
AMG gateway control unit →
User interface CAN →
Head unit →
HSVL line →
Audio/COMAND display
The voice connection is displayed by a status message in the telephone menu of the instrument cluster.
The HERMES control unit sends status signals over the following path:
Diagnostic CAN →
Front SAM control unit with fuse and relay module →
Interior CAN →
AMG gateway control unit →
User interface CAN →
Instrument cluster
The Service Center can perform a remote diagnosis if necessary.
If necessary, the Service Center can, e.g. send map data or points of interest to the vehicle. The data is made available to the navigation module of the head unit.
Additional function requirements for triggering the voice connection via the "MB-Contact" address book entry
- No smartphone connected via the standard Android Auto or CarPlay
The operation signals from the Audio/COMAND operating unit or touchpad are forwarded to the head unit via telematics CAN.
The head unit multifunction steering wheel button group sends the control signals via the following route:
Triggering the voice connection via the "MB-Contact" address book entry
The address book is integrated into the head unit. The HERMES control unit sets up a voice connection with the Mercedes-Benz Service Center by selecting the reserved "MB-Contact" telephone book entry.
The head unit can be switched on using the Volume adjustment and Head unit ON switch on the right lower control panel. The right lower control panel sends the operation signal 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 permanently reserved address book entry "MB-Contact" can be selected using the following components:
- Audio/COMAND control panel (except code 446 (Touchpad only))
- Touchpad (with code 446 (Touchpad only) or with code 531 (COMAND APS))
- Head unit multifunction steering wheel button group
- Voice control system (VCS [SBS]) (with code 531 (COMAND APS))
Steering wheel electronics →
Steering wheel CAN →
Steering column tube module control unit →
AMG FlexRay →
AMG gateway control unit →
User interface CAN →
Head unit
The voice control system is activated on the head unit multifunction steering wheel button group. The voice control system is automatically switched off when the call is set up. 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.
The individual voice commands are listed in the "Linguatronic operator's manual".
If the address book entry "MB Contact" was selected, the head unit sends the signal via the following route:
User interface CAN →
AMG gateway control unit →
Interior CAN →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
Mute function
When a voice connection is established, the HERMES control unit sends a signal over a direct line for muting the audio sources (mute function) to the following component, which then actuates the speaker system:
- Midline sound system amplifier control unit (except code 810 (Sound system) and except code 811 (Advanced Sound System))
- Sound system amplifier control unit (with code 810 (Sound system))
- Advanced Sound System amplifier control unit (with 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 in the language that was selected in the system settings of the head unit and transmitted in the data telegram, where possible.
The HERMES control unit receives outgoing voice signals from the driver hands-free system microphone via the head unit.
The HERMES control unit outputs the incoming voice signals via the center instrument panel mid-range speaker.
The volume of the voice output can be adjusted using the following controls:
- Head unit multifunction steering wheel button group
- Volume adjustment and Head unit ON switch of right lower control panel
The head unit multifunction steering wheel button group sends the volume setting over the following route:
Steering wheel electronics →
Steering wheel CAN →
Steering column tube module control unit →
AMG FlexRay →
AMG gateway control unit →
Interior CAN →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
The Volume adjustment and Head unit ON switch of the right lower control panel sends the volume setting 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 →
User interface CAN →
AMG gateway control unit →
Interior CAN →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
Termination of the voice connection
The voice connection can be terminated via the head unit multifunction steering wheel button group if is not performed by the Mercedes-Benz Service Center. The head unit multifunction steering wheel button group sends the control signals via the following route:
Steering wheel electronics →
Steering wheel CAN →
Steering column tube module control unit →
AMG FlexRay →
AMG gateway 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 user'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.
Interior CAN →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
| Priority | Service |
|---|---|
| 1 | Automatic emergency call |
| 2 | Manual emergency call |
| 3 | Breakdown Management |
| 4 | Concierge service or MB-Info |
Position finding
A determination of the current vehicle position is essential for many telematics services. On vehicles with code 531 (COMAND APS) the HERMES control unit receives the position finding signals from the head unit. The head unit sends the signals via the following route:
User interface CAN →
AMG gateway control unit →
Interior CAN →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
On vehicles with code 506 (Radio Audio 20 NTG 5.5), the HERMES control unit performs position finding. For position finding, the HERMES control unit uses the global navigation system (GPS). GPS is available worldwide. GPS position finding is irretrievable after vehicle transport (e.g. by train or ferry or after towing). Recalculation of the GPS position (following an interruption in satellite reception) can take several minutes. A basic position finding routine runs in parallel to the GPS position finding routine that makes it possible to also locate the position of the vehicle if GPS reception fails.
The position finding function consists of the following component functions:
- GPS position finding (With Code 506 (Radio Audio 20 NTG 5.5))
- Basic position finding (With Code 506 (Radio Audio 20 NTG 5.5))
GPS position finding (With Code 506 (Radio Audio 20 NTG 5.5))
The HERMES control unit receives the GPS signals from the GPS antenna.
Additional function requirements for basic position finding (With Code 506 (Radio Audio 20 NTG 5.5))
- Circuit 15 ON
Basic position finding (With Code 506 (Radio Audio 20 NTG 5.5))
The electronic ignition lock control unit transmits the circuit 15 status via the following route:
Interior CAN →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
The HERMES control unit requires the following signals for basic position finding:
- Wheel speed and yaw rate signals from the Electronic Stability Program control unit
- Steering wheel angle sensor
The Electronic Stability Program control unit sends the wheel speed and yaw rate signals as follows:
Chassis CAN 1 →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
The steering wheel angle sensor sends the signal as follows:
Steering column tube module control unit →
AMG FlexRay →
AMG gateway control unit →
Chassis CAN 1 →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
The HERMES control unit uses the data to calculate the current vehicle position (longitude and latitude).
Position finding errors, rolling backwards with "circuit 15 OFF" (ignition switched off) or transport of the vehicle falsify the basic position finding. In both cases, this deviation is automatically corrected on receipt of GPS data.
Forwarding of data, data requests, display messages and operating requests
The HERMES control unit forwards the data queries and operating requests that have been received via the cellular 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 relevant requirements. The HERMES control unit receives vehicle data from the front SAM control unit with fuse and relay module via diagnostic CAN and forwards this data and the data of the integrated position finding module as required to the Service Center via the cellular connection.
Internet data are communicated to the head unit, e.g. for the IP radio service, from the radio interface of the HERMES control unit via Wi-Fi to the Wi-Fi antenna, which is connected to the head unit.
AMG gateway control unit →
User interface CAN →
Head unit →
HSVL 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 operating unit (except code 446 (Touchpad only)) or with the touchpad (with code 446 (Touchpad only) or with code 531 (COMAND APS)).
The content shown on the Audio/COMAND display (e.g. pop-up window, vehicle positioning symbol) is forwarded by the HERMES control unit over the following route:
Diagnostic CAN →
Front SAM control unit with fuse and relay module →
Interior CAN →
The Audio/COMAND control panel or the touchpad sends the signals over the following route:
Telematics CAN →
Head unit →
User interface CAN →
AMG gateway control unit →
Interior CAN →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
The control signals from the Audio/COMAND control panel are forwarded to the head unit via telematics CAN.
For some services, the status of circuit 15 is taken into consideration. The electronic ignition lock control unit transmits the circuit 15 status via the following route:
Interior CAN →
Front SAM control unit with fuse and relay module →
Diagnostic CAN →
HERMES control unit
| Electrical function schematic for telematics services function | PE82.95-P-2074-97HBD | ||
| Overview of system components, telematics | GF82.85-P-9999RR |