Emergency call system, function - GF82.95-P-0004FQU
MODEL 218 with CODE (359) TELEAID emergency call system
Function requirements, emergency call system, general
- Terminal 30
- Each vehicle-related service is authorized separately
- An emergency call system control unit communication module authorized for the corresponding vehicle-related service is configured ex-factory with the telephone number of the corresponding service provider
- The vehicle owner is registered and authorized at the Service Center
Emergency call system, general
The Telematic Alarm Identification on Demand (emergency call system) (TELEAID) was primarily developed to provide the passengers in a vehicle with speedy and effective assistance in the event of an accident or another emergency situation.
The TELEAID emergency call system automatically makes an emergency call (E-call) to the Service Center of the external service provider if an accident occurs. Accident-relevant data such as the vehicle position and the type of accident are transmitted.
The Service Center then notifies the rescue service who can initiate the relevant rescue measures with the help of this information.
The emergency call system with code (359) TELEAID emergency call system is installed in vehicles up to 31.5.2012. The emergency call system control unit is not used for regular telephone calls.
This function is supplemented by further functions:
- Manual emergency call
- Antitheft alarm
- Vehicle tracking
- Vehicle remote unlocking
- Vehicle remote locking
- Roadside assistance
- MB information call
- Manual emergency call:
In the event of robbery or in similar emergency situations, the vehicle occupants can also trigger an emergency call manually.
- Antitheft alarm:
When the antitheft alarm is activated, the registered owner of the vehicle is notified of the act via mobile phone. The registered owner of the vehicle then checks the situation and, where applicable, makes a report to the police, who then issue a registration code for the damage report.
- Tracking the vehicle:
The vehicle function is used to find the vehicle after it was stolen. After the registered owner of the vehicle has provided legitimization to the Service Center via telephone by providing the registration code, the Service Center transmits the Global Positioning System (GPS) coordinates of the vehicle to the police for tracking purposes.
- Remote door unlocking:
The remote unlocking function enables the vehicle to be remotely unlocked in the event, for example, that a transmitter key (A8/1) is locked in the vehicle and a second transmitter key is not present.
- Remote door locking:
The remote door lock function of the vehicle enables the registered owner of the vehicle to remotely lock the vehicle in the event that he/she forgot to lock the vehicle. This service also requires that the registered owner of the vehicle provides legitimization to the Service Center.
- Breakdown assistance:
The breakdown assistance (roadside assistance) function gives the registered owner of the vehicle the opportunity to make contact with the Customer Assistance Center (CAC) (e.g. in the event of a defect on the vehicle). The service receptionist of the CAC can now initiate appropriate effective remedial measures, taking into account additional vehicle-specific identifying data.
- MB-Info call:
The MB-Info call function enables the driver to call up information on Mercedes-Benz brand products as well as further voice-based services (e.g. hotel booking) at any time, e.g. the following:
- Current traffic conditions
- Technical questions, complaints and services
- Mercedes-Benz products and Mercedes Card
- Leasing and financing offers
All listed vehicle-related services run automatically in the emergency call system control unit. The emergency call system control unit has a priority management feature to ensure that it does not have to manage several vehicle-related services at the same time. This determines the point at which a vehicle-related service is to be activated and which vehicle-related service has the higher priority.
| Priority | Service |
|---|---|
| 1 | Automatic emergency call |
| 2 | Manual emergency call |
| 3 | Vehicle tracking |
| 4 | Roadside assistance |
| 5 | MB Info |
| 6 | Authorization |
| 7 | Vehicle remote unlocking |
| 8 | Vehicle remote locking |
The emergency call system function consists of the following subfunctions:
- Function sequence for system start of emergency call system
- Function sequence for voice connection between vehicle and Service Center
- Position finding function sequence
- Vehicle tracking function sequence
- Function sequence for manual or automatic emergency call
- Breakdown assistance function sequence
- MB-Info function sequence
- Function sequence for remote door unlocking
- Vehicle remote locking function sequence
Function sequence for system start of emergency call system
The system start subfunction for the emergency call system is comprised of the following subfunctions:
- Function sequence for emergency call system self-test
D Telephone antenna selection function sequence
Function sequence for emergency call system self-test
With circuit 15R ON, the two red light-emitting diodes (LED) integrated into the emergency call system button come on for approx. 4 s during the self-test of the emergency call system control unit.
The status of circuit 15R is sent by the electronic ignition lock control unit over the interior CAN, the front SAM control unit and the diagnostic CAN to the emergency call system control unit.
Actuation is accomplished by the emergency call system control unit via a discrete line. This signals the self-test and activates the check of the following emergency call system states:
- Emergency call system control unit power supply
- Functional capability within the emergency call system control unit (e.g. integrated communication module or memory)
- Authorization of emergency call system by the Service Center
- Communication with Supplemental Restraint System control unit and the Electronic Stability Program control unit (except code (233) DISTRONIC PLUS, except model 218.374) or the Premium Electronic Stability Program control unit (with code (233) DISTRONIC PLUS or model 218.374)
- Emergency call system button function
- Emergency call system antenna
- Global Positioning System antenna splitter A2/5 (with code (512) COMAND APS with DVD changer or code (527) COMAND APS with single DVD drive (with navigation))
- Multifunction antenna
Communication between the emergency call system control unit, the Supplemental Restraint System control unit and the Electronic Stability Program control unit or the Premium Electronic Stability Program control unit is monitored cyclically (approx. every 500 ms) as follows:
- Chassis CAN
- Front SAM control unit
- Diagnostic CAN
If no fault is present, the two red LEDs integrated into the emergency call system button go out after approx. 5 s thereby indicating operational readiness of the emergency call system. If a fault is present of if there is no authorization, a corresponding fault message is output in the multifunction display (A1p13).
The two red LEDs in the emergency call system button are also permanently actuated.
The instrument cluster receives the signals for the message in the multifunction display from the emergency call system control unit over the following path:
- Diagnostic CAN
- Front SAM control unit
- Interior CAN
If an emergency call is triggered or a vehicle-related service is activated, the LED in the emergency call system button, the MB-Info button, or the breakdown assistance button is actuated intermittently.
Function sequence for selection of telephone antenna
The multifunction antenna is monitored with an electric test circuit. The electric circuit is supplied with electric voltage by the emergency call system control unit. In the event of a voltage drop (e.g. defect due to an accident), the emergency call system control unit recognizes the failure of the multifunction antenna and automatically switches over to the emergency call system antenna.
Function sequence for voice connection between vehicle and Service Center
When the following buttons are pressed, the emergency call system control unit sets up a voice connection to the Service Center:
- Emergency call system button
- MB-Info button
- Breakdown assistance button
Voice input occurs via the hands-free system microphone, which is integrated in the inside rearview mirror (A67). The signals of the hands-free system microphone are routed over a direct line to the COMAND controller unit, and forwarded from there over a direct line to the communication module integrated in the emergency call system control unit. The communication module then sends the hands-free system microphone signals over the following path to the Service Center:
- Direct line
- Multifunction antenna
Voice output is emitted by the emergency call system control unit at the center instrument panel speaker. At the same time, the emergency call system control unit sends a mute signal via direct line to the COMAND controller unit (except code (810) Sound system). The COMAND controller unit speaker outputs are then muted.
In vehicles with code (810) Sound system, the mute signal is sent over a direct line to the sound system amplifier control unit. The speaker outputs on the sound system amplifier control unit are muted.
A voice connection being made to the Service Center will be canceled by the emergency call system control unit after several dial-up attempts have failed. A fault message is shown on the Audio/COMAND display.
Position finding function sequence
The position finding partial function is comprised of the following subfunctions:
- Function sequence for GPS position finding
D Function sequence for basic position finding
GPS position finding function sequence
The GPS receiver integrated into the emergency call system control unit receives the GPS signals from the multifunction antenna via the following route:
- Direct line
- Global Positioning System antenna splitter
(with code (512) COMAND APS with DVD changer or code (527) COMAND APS with single DVD drive (with navigation))
- Direct line
The emergency call system control unit calculates the current position of the vehicle from the GPS signals. The emergency call system control unit stores the last 20 GPS coordinates and updates them permanently.
Basic position finding function sequence
For basic position finding, the emergency call control unit requires the following information:
- Wheel speed signals
- Distance traveled data
- Direction of travel data (forwards or backwards)
The Electronic Stability Program control unit or the Premium Electronic Stability Program control unit sends the wheel speed signals over the following path to the emergency call system control unit:
- Chassis CAN
- Front SAM control unit
- Diagnostic CAN
The instrument cluster sends the data on the distance traveled to the emergency call system control unit via the following route:
- Interior CAN
- Front SAM control unit
- Diagnostic CAN
The emergency call system control unit receives the data on the direction of travel (forwards or backwards) from the front SAM control unit via diagnostic CAN. After this the emergency call system control unit uses the distance traveled, the vehicle alignment and the direction of travel to calculate the vehicle position (degree of longitude and degree of latitude) at any given time.
Vehicle tracking function sequence
The vehicle tracking partial function consists of the two following subfunctions:
D "Theft alarm" function sequence
D "Tracking" function sequence
Additional function requirements for "Theft alarm"
- Antitheft alarm system (ATA [EDW]) active (t > 30 s)
- A higher-priority vehicle-related service is not active
"Theft alarm" function sequence
If the ATA [EDW] is triggered, the emergency call system control unit receives an "ATA [EDW] alarm" message in the following way:
- Rear SAM control unit
- Interior CAN
- Front SAM control unit
- Diagnostic CAN
The "ATA [EDW] alarm" message is transmitted by the communication module integrated into the emergency call system control unit to the Service Center over the following path:
- Direct line
- Multifunction antenna
The Service Center receives the "ATA [EDW] alarm" message and advises the vehicle owner by telephone that the ATA [EDW] alarm has been triggered. "Tracking" will not yet be accomplished by the Service Center.
Once the registered owner of the vehicle has been notified by the Service Center of the triggered ATA [EDW] alarm of his/her vehicle or if the registered owner of the vehicle has noticed the theft of the vehicle, the registered owner of the vehicle must report the theft to the police. The registered owner of the vehicle then receives a special number from the police, which confirms that the vehicle theft has been reported.
With this number, the registered owner of the vehicle calls the Service Center and gives the number to a service receptionist. The Service Center checks the query and the legitimacy of the registered owner of the vehicle and then initiates the "Tracking" procedure.
Additional function requirements for "Tracking"
- Vehicle reported as stolen to police by the registered owner of the vehicle and then to Service Center as well as legitimization of the registered owner of the vehicle
- No fault in GPS antenna systems and signals from at least 3 GPS satellites
- A higher-priority vehicle-related service is not active
"Tracking" function sequence
After the vehicle has been reported as stolen to the Service Center and legitimization of the registered owner of the vehicle, an initiation command is sent to the vehicle which prompts the emergency call system control unit to transmit the current GPS coordinates to the Service Center.
The initiation command is received by the communication module integrated into the emergency call system control module via the following path:
- Multifunction antenna
- Direct line
The emergency call system control unit then activates the GPS position finding. Then the communication module integrated into the emergency call system control unit sends the position data to the service provider in the same manner as the "EDW [ATA] alarm" message.
The position data is transmitted cyclically and for the following events:
- Exceeding a certain distance
- Recognition of damage to or manipulation of the vehicle
- Switching the ignition on or off
The Service Center forwards the location of the vehicle to the responsible command staff of the police or the security services. If necessary, a telephone connection is established between the Service Center and the vehicle. The telephone connection is also visualized in the Audio/COMAND display.
Vehicle tracking can only be deactivated by the Service Center.
Function sequence for manual or automatic emergency call
The emergency call function consists of the following subfunctions:
D Function sequence for triggering a manual emergency call
D Function sequence for triggering an automatic emergency call
D Function sequence for transmission of the emergency call data and communication with the Service Center
Function sequence for triggering a manual emergency call
The emergency call system button is pressed for t > 0.5 s.
The emergency call system control unit directly reads in the status of the emergency call system button via a direct line.
Function sequence for triggering an automatic emergency call
The emergency call system control unit reads in the crash signal from the supplemental restraint system control unit via a direct line. At the same time, the emergency call system control unit receives the crash signal (redundant) and the crash level from the supplemental restraint system control unit via the following route:
- Chassis CAN
- Front SAM control unit
- Diagnostic CAN
Then, a voice connection to the Service Center is established.
Function sequence for transmission of the emergency call data and communication with the Service Center
After a manual or automatic emergency call has been initiated, the emergency call system control unit establishes a voice connection to the Service Center.
The feedback of the Service Center is provided by means of an acoustic signal. The emergency call system control unit then automatically transmits a short message (Short Message Service (SMS)) with the following data to the Service Center via the integrated communication module:
- Vehicle position, direction of travel and history
- Vehicle data and crash analysis (accident severity)
The communication module integrated into the emergency call system control unit transmits and receives the mobile phone signals via the following route:
- Direct line
- Multifunction antenna
If a manual or automatic emergency call is active, this is indicated by one of the two red LEDs integrated into the emergency call system button flashing. This is also indicated in the multifunction display and on the COMAND display.
Additional function requirements for breakdown assistance
- A higher-priority vehicle-related service is not active
Breakdown assistance function sequence
By pressing the breakdown assistance button, a telephone connection to the service receptionist of the CAC is established. The customer now has the option of clarifying the details of the technical problem with the service receptionist, who then initiates appropriate effective remedial measures. At the same time, the emergency call system control unit transmits vehicle-specific identifying data to the CAC.
The LED in the breakdown assistance button flashes as long as the breakdown assistance is active.
The breakdown assistance function consists of the two following subfunctions:
D Breakdown assistance function sequence
D Function sequence for display of additional services
Breakdown assistance function sequence
The status of the breakdown assistance button is read in by the emergency call system control unit over a direct line. The emergency call system control unit automatically transmits an SMS with the following data to the CAC via the communication module integrated into the emergency call system control unit:
- Vehicle position
- Customer identification data
- Vehicle identification data
- Condition data
Function sequence for display of additional services
Additionally, the following other services are offered, which are shown on the COMAND display:
- "Destination Feed In" (destination coordinates that can be transferred from the navigation system)
- "Freetext" (transmission of text messages)
The additional services, e.g. "Freetext", are shown by the emergency call system control unit in the COMAND display via the following route:
- Diagnostic CAN
- Front SAM control unit
- Interior CAN
- COMAND control unit
- LVDS line
Additional function requirements for MB-Info
- A higher-priority vehicle-related service is not active
MB-Info function sequence
This vehicle-related service is a voice service that is provided via the communication module integrated into the emergency call system control unit.
The MB-Info function consists of the two following subfunctions:
D MB-Info call function sequence
D Function sequence for display of additional MB-Info services
MB-Info call function sequence
The MB-Info button is read in by the emergency call system control unit via a direct line. The emergency call system control unit automatically sends an SMS to the CAC with the following data:
- Vehicle position
- Customer identification data
- Vehicle identification data
A voice connection to the CAC is also established via the emergency call system control unit.
An activated MB-Info call is signaled optically by the LED in the MB-Info button flashing.
The emergency call system control unit sends and receives the mobile phone signals over the multifunction antenna.
During an MB-Info call, other vehicle-related services and active mobile phone connections are interrupted.
Function sequence for display of additional MB-Info services
Additionally, the following other services are offered, which are shown on the COMAND display:
- "Destination Feed In" (destination coordinates, which can be taken over from the navigation system)
- "Freetext" (transmission of text messages)
The additional MB-Info services, e.g. "Freetext", are shown by the emergency call system control unit in the COMAND display via the following route:
- Diagnostic CAN
- Front SAM control unit
- Interior CAN
- COMAND control unit
- Low voltage differential signal (LVDS) line
Additional function requirements for remote door unlocking
- The vehicle-related service remote door unlocking is activated in electronic ignition lock control unit
- Query of registered owner of vehicle by telephone to Service Center and legitimization of registered owner of vehicle by Service Center
Vehicle remote door unlock function sequence
The vehicle remote door unlocking is activated, after the Service Center has been authorized by the vehicle remote door unlocking by pressing the trunk lid/liftgate external operation switch for t > 15 s. The emergency call system control unit reads in the status of the trunk lid/liftgate external operation switch over the following path:
- Direct line
- Rear SAM control unit with fuse and relay module
- Interior CAN
- Front SAM control unit
- Diagnostic CAN
The emergency call system control unit then automatically transmits an SMS with the following data to the Service Center, via the communication module integrated into emergency call system control unit:
- Vehicle identification number (VIN)
- Vehicle model
The communication module integrated in the emergency call system control unit sends the mobile phone signals over the multifunction antenna.
The Service Center compares the data sent with the request and driver legitimization and, if the data matches, a "vehicle remote door unlock request" is sent to the vehicle. The "vehicle remote door unlock request" and the mobile phone signals are received by the communication module integrated into the emergency call system control unit over the multifunction antenna.
After receiving the "vehicle remote door unlock request", the emergency call system control unit sends the request to the electronic ignition lock control unit via the following route:
- Diagnostic CAN
- Front SAM control unit
- Interior CAN
The electronic ignition lock control unit then initiates the unlocking of all vehicle doors and the unlocking of the trunk lid. The execution of the vehicle remote door unlock is displayed by a message in the instrument cluster. In addition, the red light-emitting diode in the emergency call system button flashes.
If the "Vehicle remote door unlock request" is refused by the Service Center because, for example, the trunk lid/liftgate external operation switch was not actuated at the agreed time or legitimization was incorrect, the vehicle remote door unlock function is disabled for t = 15 min.
Additional function requirements for remote door locking
- Query of registered owner of vehicle by telephone to Service Center and for vehicle remote door locking as well as legitimization of registered owner of vehicle by the Service Center
- A higher-priority vehicle-related service is not active
Vehicle remote door locking function sequence
The vehicle remote door locking subfunction enables the registered owner of the vehicle to lock his/her unlocked vehicle. The Service Center checks the request and the legitimization of the registered owner of the vehicle and, if the data matches, it sends a remote door locking request to the vehicle.
The remote door locking request is received by the emergency call system control unit in the following way:
- Multifunction antenna
- Direct line
After receiving the remote door locking request, the emergency call system control unit sends the request to the electronic ignition lock control unit via the following route:
- Diagnostic CAN
- Front SAM control unit
- Interior CAN
The electronic ignition lock control unit then checks whether the locking of all vehicle doors and trunk lid is possible. If yes, the electronic ignition lock control unit initiates locking of all vehicle doors and the trunk lid. If not, feedback is sent to the Service Center via the same route as the remote door locking request.
If the vehicle doors and the trunk lid have been locked, feedback is also sent to the Service Center via the same route as the remote door locking request. After receiving the feedback, the Service Center notifies the registered owner of the vehicle about the remote door locking result (locked: yes or no) over the phone connection that is still active.
| Electrical function diagram for status display of emergency call system, function | PE82.95-P-2061-97XAA | ||
| Electrical function diagram for voice connection between vehicle and Service Center, function | PE82.95-P-2069-97XAA | ||
| Electrical function diagram for position finding, function | PE82.95-P-2070-97XAA | ||
| Electrical function diagram for vehicle location, function | PE82.95-P-2064-97XAA | ||
| Electrical function diagram for manual or automatic emergency call, function | PE82.95-P-2066-97XAA | ||
| Electrical function schematic for MB information and breakdown assistance function | PE82.95-P-2073-97XAA | ||
| Overview of system components, telematics | Model 218.3 up to model year 2013/AEJ12) | GF82.85-P-9999FQ |