Telematics Services Function - GF82.85-P-2060RDN
Model 172.4
as of model year 2017
with code 362 (HERMES communications module LTE)
with code 494 (US version)
Shown on model 172.4
General telematics services function requirements
- Circuit 30
- Transport mode not active
- The HERMES control unit (N112/9) is configured ex factory with the telephone number of the relevant 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 multifunction antenna and the emergency call system antenna.
The multifunction antenna and the emergency call system antenna are used simultaneously and together they form a transmitting and reception diversity.
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:
Interior CAN →
Front SAM control unit →
Diagnostic CAN →
HERMES control unit
The telematics services function encompasses the following subfunctions:
- Overview of basic services as of 01.06.2018
- Overview of telematics services with code 11U (Remote Online) as of 01.06.2018
- Overview of telematics services up to 31.05.2018
- Voice connection between vehicle and Service Center
- Position finding
- Forwarding of vehicle data, display messages, data queries and operating requests
Model 172.4
as of model year 2019
with code 362 (HERMES communications module LTE)
with code 494 (US version)
Mercedes me connect telematics services are offered. Market-specific deviations are possible in the service offer.
The emergency call, Internet connection and the transfer of real-time traffic data are described elsewhere.
Overview of basic services as of 01.06.2018
The following services are possible:
- 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 customer that service is required via the medium selected by the customer (e.g. "MyMercedes", email, 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 date, asking whether a connection to customer center should be set up. If the customer selects "Call now", a voice connection is established to the Service Center. If the customer selects "Call later", the pop-up window is displayed again later. If the customer 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 customer that the wear parts require replacement via the medium selected by the customer (e.g. "MyMercedes", email, telephone).
- Accident management:
The customer can request technical assistance via a voice connection after an accident.
- Breakdown management:
The customer can request technical assistance via a voice connection. With the consent of the customer, vehicle data can be transmitted in order to provide quicker and more effective assistance.
Overview of telematics services with code 11U (Remote Online) as of 01.06.2018
These app services allow the customer to use his terminals (e.g. Smartphone, tablet or PC) to transmit information and operating requests to the vehicle via the Service Center and receive up-to-date vehicle data that has been prepared by the app. For example, the following app service are available:
- Remote closing and opening of the doors:
The HERMES control unit forwards the query via the diagnostic CAN, the front SAM control unit and the interior CAN 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 online.
- 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. At the same time, optical and acoustic vehicle detection (several short beeps and flashes over several seconds) can be triggered via the smartphone.
- Vehicle locating:
The customer is informed online of the current vehicle location 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 terminated by calling the Service Center from the vehicle.
- Geographical vehicle monitoring:
The customer is informed online as soon as his/her vehicle leaves or reaches an area marked by the customer; activation of this function is displayed in the vehicle with an icon on the Audio/COMAND display and can be terminated by calling the Service Center from the vehicle.
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:
A voice connection to the Service Center is established by pressing the breakdown assistance button. This means that quick and effective assistance measures can be initiated in the event of a defect in the vehicle.
- 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 via the diagnostic CAN, the front SAM control unit and the interior CAN 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.
- 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 for activating or terminating the panic alarm is forwarded by the HERMES control unit via the diagnostic CAN, the front SAM control unit and the interior CAN to the rear SAM control unit.
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 in a parked and locked vehicle (windows and doors closed) and switches it off again after a limited period of time in order for the air conditioning system's "Load Mode" to reach pre-entry climate control. The HERMES control unit forwards the triggering signal via the diagnostic CAN to the electronic ignition lock control unit.
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:
- Triggering the voice connection via the breakdown assistance button or the MB-Info button
- Mute function
- Hands-free
- Termination of the voice connection
- Prioritization
Triggering the voice connection via the breakdown assistance button or the MB-Info button
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 via the following route:
Overhead control panel control unit →
Wiper/inside rearview mirror LIN →
Front SAM control unit →
Diagnostic CAN →
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. A display is also shown on the instrument cluster (over diagnostic CAN, front SAM control unit and chassis CAN 2), and on the Audio/COMAND display (over the diagnostic CAN, front SAM control unit, interior CAN, audio equipment and the LVDS line).
At the same time as establishing a voice connection, a data telegram is also sent to the Mercedes-Benz Service Center which contains data such as the following: time stamp, GPS position (global navigation system), language configured on audio equipment and 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 is shown 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.
Mute function
When a voice connection is set up, the HERMES control unit sends a signal over a direct line for muting the audio sources to the following component, which then actuates the speaker system:
- Sound system amplifier control unit (with code 810 (Sound system))
- Audio equipment (except code 810 (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 the outgoing voice signals over the audio equipment from the inside rearview mirror microphone.
The HERMES control unit emits the incoming voice signals over the center instrument panel speaker (with code 810 (Sound system)) or over the emergency call speaker (except code 810 (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 →
Front SAM control unit →
Chassis CAN 2 →
Instrument cluster →
Interior CAN →
Front SAM 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 →
Front SAM control unit →
Chassis CAN 2 →
Instrument cluster →
Interior CAN →
Front SAM 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 takes over the signals for position finding from the audio equipment. The audio equipment sends the signals over the following path:
Interior CAN →
Front SAM control unit →
Diagnostic CAN →
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 mobile radio connection to the Service Center via the diagnostic CAN to the front SAM control unit, where they are further distributed in accordance with the respective requirements. The HERMES control unit receives the vehicle data over the diagnostic CAN from the front SAM control unit and forwards the data as well as the position finding from the audio equipment to match the requests over the multifunction antenna and the emergency call system 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 →
Interior CAN →
Audio equipment →
LVDS line →
Audio/COMAND display
Control communication (e.g. switch-on) is sent by the audio equipment over the telematics CAN to the Audio/COMAND display.
Some messages on the Audio/COMAND display can be confirmed with the Audio/COMAND control panel. The Audio/COMAND control panel sends the signals via the following route:
Telematics CAN →
Audio equipment →
Interior CAN →
Front SAM control unit →
Diagnostic CAN →
HERMES control unit
| Electrical function schematic for telematics services function | PE82.95-P-2074-97TAB | ||
| Overview of system components, telematics | GF82.85-P-9999RD |