General telematics services function requirements
Circuit 30
Transport mode not active
Each vehicle-related service is authorized separately.
An emergency call system control unit (N123/4) communication module authorized for the relevant vehicle-related service is configured ex-factory with the telephone number of the relevant service provider.
The vehicle owner is registered and authorized at the Service Center.
A higher-priority vehicle-related service is not active (except when transmitting map data as part of another service).
General telematics services
The telematics services of the emergency call system are realized via a mobile radio connection to the Service Center. The emergency call system control unit transmits and receives the mobile phone signal via the following antenna:
Telephone and stationary heater antenna (A2/22) (model 242 except code 536 (SIRIUS satellite radio), model 156)
Multifunction antenna (A28/11) (model 242 with code 536 (SIRIUS satellite radio), model 117.3)
In the event of poor reception or a malfunction of the telephone and stationary heater antenna or the multifunction antenna (e.g. defective because of rollover) the emergency call system control unit automatically uses the emergency call system antenna (A2/52) to transmit mobile phone signals.
On vehicles as of 01.09.2015 (model year 2016) there are two chassis CAN variants.
Variant 1:
If the vehicle does not contain any of the equipment codes specified in variant 2, then, as before, only one chassis CAN (CAN E) is available.
Version 2:
If the vehicle has one of the following equipment codes, then one chassis CAN 1 (CAN E1) and one chassis CAN 2 (CAN E2) is available:
Code 218 (Reversing camera)
CODE 234 (Blind Spot Assist)
Code 459 (Steel suspension with adjustable damping)
Code 475 (Tire pressure monitor)
Code 476 (Lane Keeping Assist)
Code 513 (Speed Limit Assist)
CODE 614 (Bi-xenon headlamp)
CODE 615 (Bi-xenon headlamp with active curve lights)
CODE 618 (Bi-xenon headlamp)
Code 621 (Intelligent Light System (left-hand traffic))
Code 622 (Intelligent Light System)
Code 631 (Static LED headlamps for left-hand traffic system)
Code 632 (Static LED headlamps for right-hand traffic system)
The function of the following emergency call system telematics services is described in this document:
Tracking and notification in the event of anti-theft warning
Roadside assistance
MB Info
Vehicle remote unlocking
Vehicle remote locking
Remote diagnosis ("Remote Diagnosis")
Transmission of vehicle position ("Vehicle Locator")
Notification of a certain speed being exceeded ("Speed Alert")
Notification if a certain area has been reached or left ("Geo Fencing")
Transmission of information (e.g. map data) to the vehicle ("Remote Information Feed")
Transmission of updates to vehicle ("Remote Update")
Visual and acoustic vehicle recognition ("Flash Lights and Sound Horn")
Via the mobile radio connection to the Service Center the emergency call system control unit also receives the trigger signal for the "Remote Start" function (for pre-entry climate control)which the customer transmits via the mobile phone to the service provider. 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 emergency call system control unit forwards the triggering signal via the diagnostic CAN (CAN D) to the electronic ignition lock control unit (N73).
Tracking and notification in the event of anti-theft warning
The following points are vehicle tracking objectives:
Retrieval of stolen or misappropriated vehicles
Fast assistance if vehicle stolen or in the event of a holdup
The vehicle tracking function consists of the following subfunctions:
Anti-theft alarm system (with CODE 551 (Anti-theft alarm system (ATA [EDW])))
Vehicle theft telephone message from vehicle owner to police and then to Service Center
Vehicle tracking
Additional function requirement for anti-theft alarm system (with CODE 551 (Anti-theft alarm system (ATA [EDW])))
Anti-theft alarm system (ATA [EDW]) is active for t > 30 s.
Anti-theft alarm system (with CODE 551 (Anti-theft alarm system (ATA [EDW])))
If the anti-theft alarm system is triggered, the SAM control unit (N10) transmits the "ATA [EDW] alarm" message via the following route:
Interior CAN (CAN B)
Electronic ignition lock control unit
Diagnostic CAN
Emergency call system control unit
The "ATA [EDW] alarm" message is transmitted to the Service Center by the communications module integrated in the emergency call system control unit via the telephone and stationary heater antenna (model 242 except code 536 (SIRIUS satellite radio), model 156) or the multifunction antenna (model 242 with code 536 (SIRIUS satellite radio), model 117.3). The Service Center receives the "ATA [EDW] alarm" message and advises the vehicle owner by telephone that the ATA [EDW] alarm has been triggered. "Vehicle tracking" not yet triggered by the Service Center.
Additional function requirements for vehicle theft telephone message from vehicle owner to police and then to Service Center
Vehicle owner notices that vehicle has been stolen.
Vehicle theft telephone message from vehicle owner to police and then to Service Center
If the vehicle owner has been informed by the Service Center that his/her vehicle has been stolen or if the vehicle owner himself/herself notices that the vehicle has been stolen, it is first necessary for the vehicle owner to report the theft to the police. 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 report to the Service Center, by telephone, and give this number to the employee there. The Service Center checks the request and legitimization (authorization) of the vehicle owner.
Additional function requirement for tracking
Vehicle reported as stolen by vehicle owner, by telephone, to police and then to Service Center as well as legitimization (authorization) by Service Center
Vehicle tracking
After reporting the theft to the Service Center and legitimization (authorization) by the Service Center, an initiation command is transmitted to the vehicle.
The initiation command is received by the communication module integrated in the emergency call system control unit via the following antenna:
Telephone and stationary heater antenna (model 242 except code 536 (SIRIUS satellite radio), model 156)
Multifunction antenna (model 242 with code 536 (SIRIUS satellite radio), model 117.3)
The emergency call system control unit then activates the GPS position finding and also the voice connection to the vehicle, if necessary. Then the communication module integrated into the emergency call system control unit transmits the position data to the service provided in the same manner as the "ATA alarm" message.
The position data is transmitted cyclically and for the following events:
Exceeding a certain distance
Circuit 15 ON or circuit 15 OFF (switching the ignition on or off)
The Service Center forwards the location of the vehicle to the responsible command staff (e.g. police). The command staff can then decide whether or not to speak to the driver.
Vehicle tracking can only be deactivated by the Service Center.
Additional function requirements for breakdown assistance
Triggering of breakdown assistance by pressing the breakdown assistance button (S93/3s4) for t > 2 s
Roadside assistance
With the breakdown assistance function it is possible for the customer to contact the Service Center in the event of a problem with the vehicle, for example. The Service Center can now take further vehicle-specific data into consideration to initiate effective assistance measures. After reading in the breakdown assistance button status signal, the emergency call system control unit sets up a voice connection to the Service Center.
The status signal of the breakdown assistance button is transmitted via the following route:
Overhead control panel control unit (N70)
Roof LIN (LIN B13)
SAM control unit
Interior CAN
Electronic ignition lock control unit
Diagnostic CAN
Emergency call system control unit
After feedback from the Service Center by means of a special sound, the emergency call system control unit automatically transmits a Short Message Service (SMS) message to the Service Center containing the following data:
Vehicle position
Customer and vehicle identification data
Vehicle data from diagnostic CAN ("Initial Summary")
The Service Center can perform a remote diagnosis if necessary.
The communications module integrated in the emergency call system control unit transmits and receives the mobile phone signals from the telephone and stationary heater antenna (model 242 except code 536 (SIRIUS satellite radio), model 156) or the multifunction antenna (model 242 with code 536 (SIRIUS satellite radio), model 117.3).
In the event of breakdown assistance, other vehicle-related services with lower priority (e.g. MB-Info call) are interrupted.
The light emitting diode integrated into the breakdown assistance button flashes as long as the breakdown assistance is active. This is also indicated in the instrument cluster (A1) and on the Audio/COMAND display (A40/8).
In the event of a breakdown assistance instance, the Service Center can transmit map data to the vehicle if necessary.
Additional function requirement for MB Info
Triggering of an MB-Info call by pressing the MB-Info button (S93/3s5)
MB Info
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). This vehicle-related service is primarily an oral information service that is provided via the communications module integrated into the emergency call system control unit.
In the event of an MB-Info call, the Service Center can transmit map data to the vehicle if necessary.
The status signal of the MB-Info button is transmitted via the following route:
Overhead control panel control unit
Roof LIN
SAM control unit
Interior CAN
Electronic ignition lock control unit
Diagnostic CAN
Emergency call system control unit
The emergency call system control unit then completes a voice connection to the Service Center. After the Service Center replies with a special tone, the emergency call system control unit automatically transmits an SMS to the Service Center via the integrated communication module.
The automatic SMS of the emergency call system control unit to the Service Center contains the following data:
Vehicle position
Customer and vehicle identification data
Vehicle data from diagnostic CAN ("Initial Summary")
The emergency call system control unit transmits and receives the mobile phone signals from the telephone and stationary heater antenna (model 242 except code 536 (SIRIUS satellite radio), model 156) or the multifunction antenna (model 242 with code 536 (SIRIUS satellite radio), model 117.3).
The MB-Info button's integrated light emitting diode flashes as long as the MB-Info call is activated. This is also indicated in the instrument cluster and on the Audio/COMAND display.
In the event of an MB-Info call, other vehicle-related services with lower priority (e.g. vehicle remote door unlock) are interrupted.
Additional function requirements for remote door unlocking
Query for remote door unlocking with legitimation from the Service Center or by means of an appropriate application program for mobile devices
Vehicle remote unlocking
The vehicle remote door unlock function enables the driver to have the Service Center remotely unlock his/her vehicle, e.g. if he/she has left the transmitter key (A8/1) in the vehicle and a second transmitter key is not available.
If requested by the Service Center, the emergency call system control unit automatically transmits an SMS to the Service Center containing the following data via the communication module integrated in the emergency call system control unit:
Vehicle position
Customer identification data
Vehicle identification data
The communications module integrated in the emergency call system control unit transmits the mobile phone signals via the telephone and stationary heater antenna (model 242 except code 536 (SIRIUS satellite radio), model 156) or the multifunction antenna (model 242 with code 536 (SIRIUS satellite radio), model 117.3) to the mobile telephone network. The Service Center receives the mobile radio signals and compares the transmitted data with the query and the legitimization (authorization) of the driver.
If the data matches, the Service Center issues a "vehicle remote door unlock request" to the vehicle. The communications module integrated in the emergency call system control unit receives the "Vehicle remote door unlocking request" and the mobile phone signals from the telephone and stationary heater antenna (model 242 except code 536 (SIRIUS satellite radio), model 156) or the multifunction antenna (model 242 with code 536 (SIRIUS satellite radio), model 117.3).
Upon receipt of the "vehicle remote door unlock request" the emergency call system control unit transmits the request to the electronic ignition lock control unit via the diagnostic CAN. The electronic ignition lock control unit then initiates the unlocking of all vehicle doors and the unlocking of the liftgate.
The execution of the vehicle remote door unlock is displayed by a message in the instrument cluster. The red light-emitting diodes in the emergency call system button also flash (S93/3s2).
If the "Vehicle remote door unlocking request" is refused by the Service Center because, for example, the external operation switch was not actuated at the agreed time or there is no legitimization, the vehicle remote door unlocking function is disabled for t = 15 min.
Additional function requirements for vehicle remote door locking
Telephone request for vehicle remote door lock with legitimization (authorization) at the Service Center
Vehicle remote locking
The vehicle remote door locking function enables the driver to lock his/her vehicle remotely through a Service Center if he/she has forgotten to lock the vehicle.
The Service Center checks the request and legitimization (authorization) of the driver. If the data matches, the Service Center issues a "vehicle remote door lock request" to the vehicle.
The "Vehicle remote door locking request" is received via the telephone and stationary heater antenna (model 242 except code 536 (SIRIUS satellite radio), model 156) or the multifunction antenna (model 242 with code 536 (SIRIUS satellite radio), model 117.3) by the emergency call system control unit.
Upon receipt of the "vehicle remote door lock request" the emergency call system control unit transmits the request to the electronic ignition lock control unit via the diagnostic CAN. The electronic ignition lock control unit checks whether all vehicle doors and the liftgate can be locked. If all vehicle doors and the liftgate can be locked, the electronic ignition lock control unit initiates the locking process.
Remote diagnosis ("Remote Diagnosis")
With remote diagnosis, diagnostic data is transmitted to the Service Center by the emergency call system control unit via the telephone and stationary heater antenna (model 242 except code 536 (SIRIUS satellite radio), model 156) or the multifunction antenna (model 242 with code 536 (SIRIUS satellite radio), model 117.3).
The transmission of diagnostic data takes place automatically (via scripts, for evaluation) and also manually as part of breakdown assistance.
The manual remote diagnosis is triggered by the Service Center as part of breakdown assistance. A pop-up window appears on the Audio/COMAND display asking the vehicle user to confirm initiation of the remote diagnosis. As soon as the vehicle user confirms the request, the voice connection to the Service Center is interrupted and the transmission of the diagnostic data starts. As soon as the diagnostic data has been transmitted, the Service Center restores the voice connection to the vehicle.
As well as the diagnostic data, the emergency call system control unit also transmits status information ("TRANSMISSION_SUCCESS" or "TRANSMISSION_FAILURE").
The emergency call system control unit receives the diagnostic data via the diagnostic CAN from the electronic ignition lock control unit as a central interface.
Transmission of vehicle position ("Vehicle Locator")
This service makes it possible for the user to determine the vehicle's current location by calling or transmitting an Internet inquiry to the Service Center. 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.
The transmission of the vehicle position is not indicated in the vehicle or made noticeable in any other way.
The emergency call system control unit receives the request from the Service Center and then transmits the following data back to the Service Center:
Time
Position information (longitude and latitude)
Type of position finding (Global Positioning System (GPS) or basic position finding)
With circuit 15 OFF (ignition OFF) the emergency call system control unit transmits the last position that was determined.
The emergency call system control unit receives the GPS data via direct lines via the following route:
GPS antenna (A2/23) (model 242 except code 536 (SIRIUS satellite radio), model 156) or multifunction antenna (model 242 with code 536 (SIRIUS satellite radio), model 117.3)
Global positioning system antenna splitter (A2/5) (with code 508 (Navigation box preinstallation), with code 509 (Navigation box), with code 512 (COMAND APS with DVD changer) or vehicle model 242, 117.3 as of 03.11.2014, or model 156 as of 01.09.2015)
The wheel speed signals and the direction of travel are transmitted by the Electronic Stability Program control unit (N30/4) via the following route:
Variant 1:
Chassis CAN
Version 2:
Chassis CAN 1
Electronic ignition lock control unit
Diagnostic CAN
Emergency call system control unit
Additional function requirement for notification of a certain speed being exceeded ("Speed Alert")
Circuit 15 ON (for executing the service, not for activation)
Notification of a certain speed being exceeded ("Speed Alert")
By making a call or transmitting an Internet inquiry to the Service Center, the user can define a speed for the vehicle which, when exceeded, will cause the user to be notified by SMS or e-mail from the Service Center.
As soon as the Service Center has activated the service, the emergency call system control unit reads in the speed value from the diagnostic CAN at intervals of no more than 5 seconds with circuit 15 ON. If the defined value is exceeded, the emergency call system control unit transmits a message containing the current position data to the Service Center, which notifies the user.
The emergency call system control unit only transmits one message within a certain time frame. The time frame is defined by the Service Center.
The speed value can be anywhere within the range between 0 and 255 km/h, meaning that the user can ask for notification as soon as the stationary vehicle is driven away.
The transmission of data is not indicated in the vehicle or made noticeable in any other way.
Notification if a certain area has been reached or left ("Geo Fencing")
By making a call or transmitting an Internet inquiry to the Service Center, the user can define areas where the user will be notified by SMS, e-mail or an automatic telephone call when they are entered or left.
The areas can be circular or defined as polygons with at least 3 and a maximum of 10 corner points. When polygonal areas are being defined, the corner points must be specified in clockwise order. If overlaps occur when the corner points are being connected, the emergency call system control unit transmits a fault message to the Service Center.
Up to 20 circular or polygonal areas can be defined and stored. The standard error tolerance for position finding is 100 m. Whenever the ignition is switched on, the standard error tolerance is set again.
For this service, the emergency call system control unit evaluates the GPS data once per minute. As soon as an area limit is reached, the position of the vehicle is determined at shorter time intervals.
As soon as an area limit is reached, each ignition change (circuit 15 ON or OFF) is also reported to the Service Center.
The transmission of data is not indicated in the vehicle or made noticeable in any other way.
Transmission of information (e.g. map data) to the vehicle ("Remote Information Feed")
The user can transfer suitable information to the vehicle via the Internet (e.g. Google Maps, Yahoo) or the Service Center with this service. The data is used in the vehicle by the audio equipment.
All information, including the information that is transmitted via the Internet, is transmitted to the emergency call system control unit by the Service Center via the telephone and stationary heater antenna (model 242 except code 536 (SIRIUS satellite radio) or model 156) or the multifunction antenna (model 242 with code 536 (SIRIUS satellite radio) or model 117.3). If circuit 15 is OFF, the emergency call system control unit stores the data in a buffer. If circuit 15 is ON, the emergency call system control unit forwards the received data to the audio equipment, as soon as this is switched on.
Information of the following kind can be received by the emergency call system control unit, buffered and forwarded:
Points of Interest (buffer: for a maximum of 100 Points of Interest)
Routes (buffer: maximum of 30 routes, each with up to 255 route points)
Free text (buffer: maximum 10 data records)
Free text can also be transmitted to a different vehicle than one's own.
The emergency call system control unit forwards the received information as follows:
Diagnostic CAN
Electronic ignition lock control unit
Interior CAN
Audio unit
The audio equipment indicates that the information has been received by displaying a pop-up window on the Audio/COMAND display.
If the audio equipment cannot process the received data (e.g. map data in vehicles without navigation), the data is ignored. No error message or other message is displayed on the Audio/COMAND display.
Map data can be sent by the Service Center as part of an emergency call, breakdown assistance or an MB-Info call.
Additional function requirements for transmission of updates to the vehicle ("Remote Update")
Circuit 15 ON (for carrying out the service, not for activation)
Transmission of updates to vehicle ("Remote Update")
The software of the emergency call system control unit is updated using this service, without the user having to visit a workshop.
If the Service Center transmits a software update request to the emergency call system control unit, the emergency call system control unit downloads the relevant software via the telephone and stationary heater antenna (model 242 except code 536 (SIRIUS satellite radio) or model 156) or the multifunction antenna (model 242 with code 536 (SIRIUS satellite radio) or model 117.3) as soon as the prerequisites for this have been met.
The software is not updated immediately after transmission, but only 15 min. after circuit 15 OFF.
The emergency call system control unit transmits notification back to the Service Center that the software update has been successfully carried out.
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 user activates and deactivates the service by making a call to the Service Center.
The Service Center transmits an appropriate message to the emergency call system control unit. The emergency call system control unit then activates or deactivates the panic alarm by transmitting an appropriate command to the SAM control unit. The SAM control unit receives commands via the following route:
Interior CAN
Electronic ignition lock control unit
Diagnostic CAN
Emergency call system control unit
The panic alarm can also be activated or deactivated by a corresponding application program for mobile devices.