Emergency call system control unit, component description - GF82.95-P-3212GZU

MODEL 164 with CODE (359) TELE AID emergency call system with CODE (494) USA version

Shown on model designation 164.1

Fig 1: Identifying Emergency Call System Control Unit

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Location

The emergency call system control unit is located on a bracket below the rear bench seat.

The individual services must be authorized.

Task

The emergency call system control unit is responsible for the following functions:

Integrated telephone module for emergency call, MB-Info call, roadside assistance call, tracking and remote door unlock
Independent position sensing
Acquiring and storing vehicle-specific data (e.g. circuit status)
Actuation of TELE AID antenna (A2/93a4) or TELE AID backup antenna (A2/50)
Reading in the voice signal over the hands-free system microphone group (A67b1)
Voice output over the center cockpit center speaker (centerfill) (H4/27)
Reading in the crash data from the restrain system control unit (N2/7) over a discreet line as well as redundant data over the Control Area Network bus, class D (diagnosis)
Unlocking the vehicle in an emergency
Reading in the SOS pushbutton switch (S93/3) and MB-Info and telediagnosis button group (S93/6) over 2 separate and discreet lines
Reading in satellite data over the GPS antenna (A2/93a6)
Generating and keeping an SMS ready
Muting other audio signals (e.g. radio navigation, telephone)

Design

The emergency call system control unit is designed primarily as follows:

Integrated telephone module
Integrated navigation module
Memory for vehicle-specific data
Screened metal housing

Function

The emergency call system control unit consists of two modules,

navigation module and
communication module

The navigation module allows precise determination of the vehicle position. The communication module is used for handling the emergency call and telematics functions. All important data required for Telematic Alarm Identification on Demand (emergency call system) (TELE AID) emergency call, are processed centrally by these two modules. In the event of an emergency call, the emergency call telegram is generated in the form of an SMS with the aid of the built-in navigation module.

The crash data are received from the restraint systems control unit via a serial interface as well as redundantly over the Controller Area Network bus, class D (diagnosis).

The emergency call system control unit is capable of diagnosis over a diagnosis bus through the central gateway control unit (N93) with STAR DIAGNOSIS.