GF82.95-P-0001P TELE AID Function

GF82.95-P-0001P TELE AID Function

MODELS 203, 210, 220 up to 31.8.03
- with CODE (855) TELE AID
- with CODE (930) Taxi emergency call
MODELS 208.3, 215 up to 31.8.03
- with CODE (855) TELE AID

TELE AID, general
The name TELE AID stands for TELEMATIC ALARM IDENTIFICATION ON DEMAND. TELE AID is an automatic emergency call system using the availability of new technologies such as vehicle location finding via satellite and wide distribution of mobile telephone network for reducing accident causes (rescue time reduction). Emergency calls and precise location description are automated by TELE AID and therefore do not depend on incorrect human behavior in stress situations.
Information processing of systems associated with TELE AID is performed via conventional wiring and vehicle's own bus systems (CAN and D2B).

TELE AID includes three services:
- TELE AID emergency call
- TELE AID telediagnosis
- MB information
TELE AID emergency call is supplemented by TELE AID telediagnosis and the MB information service
TELE AID telediagnosis allows assistance to be obtained quickly in the case of a vehicle defect.
The prerequisites and function sequence of TELE AID telediagnosis are almost identical to the function sequence of TELE AID emergency call.
If vehicle operational problems occur, the driver can reach the responsible Mercedes-Benz service points via MB-Info.

Function sequence for a TELE AID emergency call
A TELE AID emergency call can be actuated automatically or manually. The following actuation procedures should be distinguished:
- Automatically,
- by the restraint system control unit (N2/7)
or
- by the external tilting cone sensor (B66).

- Manually:
- by pressing the SOS pushbutton (S93/3) and also for taxi assistance call (code 930)
- by pressing the emergency alarm actuation button (S62/6)

If an alarm is triggered, the D2B telephone and TELE AID transmitter/ receiver (A35/17) sets up an emergency call telegram containing information on the accident severity, vehicle identification, vehicle positioning and type of alarm actuation.
If the telephone antenna (A2/22) is defective (model 215), (A2/49a1) (models 203, 208, 210, 220) the vehicle automatically switches to the TELE AID backup antenna (A2/50).

The emergency call telegram is transmitted via the vehicle telephone equipment (digital network).
The service provider number to be dialed is stored on the SIM card (TELE AID SIM) that is installed in the D2B telephone and TELE AID transmitter/receiver (A35/17) and dialed automatically by the system.
The numbers dialed by the system vary according to the requested service. While the Tegoron company is responsible for the TELE AID emergency call, the CAC is responsible for the TELE AID telediagnosis and MB information (MB customer assistance center). If the power supply is interrupted (e.g. battery failure) the system is able to switch automatically over to an additional battery (G1/1).

When the vehicle battery is disconnected for repair purposes, for example, the system switches automatically over to the additional battery (G1/1) when the telephone system is not set to the service mode.

The emergency call telegram is received and decoded by the service provider. When this is done, the position data contained in the message are converted by means of a street database into location and street name and forwarded together with further information from the emergency call message, to the rescue center responsible (as a general rule the police).
The decoded emergency call telegram is transmitted to the rescue service by the service provider as follows:
- Either via electronic data transmission or
- via a telephone voice connection.

With a TELE AID service (emergency call, telediagnosis, MB information) a voice connection (via mobile telephone network) is accomplished from the vehicle to the associated service point. Then the required rescue measures are started there.

When initially started the system performs an authorization. For this purpose a valid SIM Subscriber Identification Module) card (for TELE AID) must be installed in the D2B telephone and TELE AID
transmitter/receiver (A35/17) and a service contract made with the corresponding service provider.

For the TELE AID service (code 855) it is possible to install a SIM card for the D1 or D2 network, whereas for the TELE AID service (code 855) with taxi emergency call (code 930) the installation of a SIM card for the D1 network is required. The TELE AID service cannot be used without authorization .If no authorization has been obtained or the TELE AID emergency call system is malfunctioning, the SOS pushbutton switch (S93/3) indicator lamp comes on and an error message appears in the instrument cluster (A1) display.







Pictorial representation of procedure in case of an accident







If no authorization has been obtained or the TELE AID telediagnosis/MB information service is malfunctioning, an error message appears also in the instrument cluster (A1) display.

The following structogram indicates, strongly simplified, the sequence of a TELE AID emergency call.

The abbreviations used have the following meaning:
GSM Global System for Mobile Communication
PIN Personal Identification Number
SIM Subscriber identification module (for TELE AID)
A34 Telephone handset
A35/17 D2B telephone and TELE AID transmitter/receiver
G1 Battery
G1/1 Additional battery
S93/3 SOS pushbutton switch







Emergency call message is shown (TELE AID emergency call)
This is a TELE AID emergency call, for test purposes only has been triggered.







Emergency call card is shown (TELE AID emergency call)
This is a TELE AID emergency call, for test purposes only has been triggered.