Component description for emergency call system control unit - GF82.95-P-3212LEU

MODEL 216 with CODE (359) TELE AID emergency call system as of model year 2009 /YoM 08 

MODEL 221 with CODE (359) TELE AID emergency call system as of model year 2009 /YoM 08 

Shown on model 221 

Location 

The emergency call system control unit is located in the trunk at the left front at the rear wall.

Task 

• Realization of vehicle-related services 
• Regulation of priorities over integrated priority management 
• Communication management between vehicle and service center 
• Forwarding vehicle position and identification as well as other required data to the service center 
• Audio management 
• Display management 
• Fault handling 
• Receive signals 
• Transmit signals 

Realization of vehicle-related services 

• Realization of following vehicle-related services:
  • Authorization (provisioning)
  • Emergency call (E-Call) manual or automatic, including police emergency call number "911"
  • MB-Info call
  • Breakdown assistance (Roadside Assistance)
  • Vehicle tracking
  • Vehicle remote door unlock
  • Vehicle remote door lock

Regulation of priorities over integrated priority management 

Priority	Service
1	Automatic emergency call
2	Manual emergency call
3	Vehicle tracking
4	Roadside assistance
5	MB information call
6	Authorization
7	Vehicle remote unlocking
7	Vehicle remote locking

Communication management between vehicle and service center 

• Communication management between the vehicle and Service Center over the integrated communication module and the mobile telephone network as well as forwarding information to the customer when required

Forwarding vehicle position and identification as well as other required data to the service center 

• Forwarding vehicle position and identification as well as other required data to the service center after activation by the following actions:
  • Crash signal from restraint systems control unit (N2/7), for automatic emergency call
  • Actuation of SOS push-button switch (S93/3), for manual emergency call
  • Actuation of MB-Info button (S93/6s1), for MB-Info call
  • Actuation of Telediagnosis button (S93/6s2), for breakdown assistance
  • Call to Service Center and operation of trunk lid external operation switch (S88/8), for vehicle remote door unlock and lock
  • Call to Service Center and reporting of theft for vehicle tracking

Audio management 

• Mute audio sources (MUTE)
• Output of audio signals on the center cockpit speaker (Centerfill) (H4/27)

Display management 

• Display management on COMAND display (A40/8), in the instrument cluster (A1), in the SOS push button, in the MB-Info button or the telediagnosis button

Fault handling 

After activation of circuit 15R, the emergency call system control unit performs a self-test (for approx. t = 3.5 s). If the self-test is successful, the emergency call system is then ready for operation. In the event of a fault, a fault message is displayed on the instrument cluster, depending on the type of fault, and the two red light-emitting diodes (LEDs) in the SOS push-button switch are actuated continuously. Depending on the fault type, the fault is also stored in the emergency call system control unit's memory.

Receive signals 

• Direct lines 
• Controller Area Network (data bus/CAN bus) (CAN) 

Direct lines 

• Power supply over circuit 30 and circuit 31 over one direct line each
• Status signal for circuit 15R over a direct line
• SOS push-button switch over discrete line
• MB-Info button signal over discrete line
• Telediagnosis button signal over discrete line
• Digital crash signal from restraint systems control unit over a direct line
• Signals from hands-free system microphone group (A67b1) over the voice control system control unit (VCS [SBS]) (N41/3) (up to 31.5.09) or from the COMAND controller unit (A40/3) (as of 1.6.09) over direct lines
• Mobile radio signals or data from the emergency call antenna (A2/52) over a coaxial cable, model 216
• Mobile phone signals or data from telephone and GPS roof antenna (A2/49) over the frequency switchover control unit (N96) (with code (389) Mobile phone preinstallation with universal interface USA/Canada) and a coaxial cable, model 221
• GPS signals from the GPS antenna (A2/49a2) over the antenna splitter (A2/5) and a coaxial cable, model 216
• GPS signals from the telephone and GPS roof antenna over the antenna splitter and a coaxial cable, model 221
• Mobile phone signals or data from the left emergency call system backup antenna (A2/54) and the right emergency call system backup antenna (A2/55) over the emergency call system antenna splitter (A2/25) and a coaxial cable

The emergency call antenna on model 216 is integrated into the GPS antenna.

CAN 

• Diagnostic CAN (CAN D) low
• Diagnostic CAN high

The emergency call system control unit is a diagnostic CAN subscriber. The emergency call system control unit receives the crash information from the restraint systems control unit redundantly including the crash level as follows:

• Chassis CAN (CAN-E)
• Central gateway control unit (N93)
• Diagnostic CAN

Transmit signals 

Direct lines 

• Voice output on center cockpit speaker (Centerfill) over discrete line
• Actuation signal for LEDs in SOS push-button over direct line
• Actuation signal for LED in MB-Info button switch over discrete line
• Actuation signal for LED in Telediagnosis button switch over discrete line
• Audio mute (MUTE) over a direct line to the audio tuner control unit (N93/1) or to the digital sound processor (A2/69) (model 221 as of 1.9.10 with code (811) Advanced Sound System)
• Mobile phone signals or data to the telephone and GPS roof antenna over the frequency switchover control unit (with code (389) Mobile phone preinstallation with universal interface USA/Canada) and a coaxial cable, model 221
• Mobile radio signals or data to the emergency call antenna over a coaxial cable, model 216
• Mobile phone signals or data to the emergency call system left backup antenna and to the emergency call system right backup antenna
• Wake-up signal to COMAND controller unit

The emergency call antenna on model 216 is integrated into the GPS antenna.

Design 

• Integrated communication module
• Integrated locating module
• Integrated Global Positioning System (GPS) receiver for position finding (Date, time, history and last known location) for listed vehicle-related services
• Memory for vehicle-specific data
• Shielded metal housing

Function 

The emergency call system control unit has its own microprocessor. A differentiation is made between the 2 subareas of the communication module and the locating module. The emergency call system control unit centrally processes all the vital data for the listed vehicle-related services.

The emergency call system control unit uses the installed locating module to calculate the vehicle position and generates a data telegram in the form of a Short Message Service (SMS) message, if one of the following vehicle-related services is activated:

• Manual or automatic emergency call, including police emergency call number "911"
• MB-Info call
• Breakdown assistance
• Vehicle remote door unlock

communication module 

The communication module integrated into the emergency call system control unit is a mobile phone transceiver enabling voice and data communication with the service center over mobile phone frequencies.

Other functions of the communication module are:

• 4 day transmission and reception capability, as soon as an SMS is received, the emergency call system control unit is activated (wake-up); after 4 days the emergency call system reverts to the "sleep mode"
• Following activation a self-diagnosis is performed and the result sent to the "controller"

If the telephone and GPS roof antenna malfunctions, model 221, or the emergency call antenna, model 216, (e.g. defective through rollover) the emergency call system control unit sends and receives the mobile radio signals or mobile radio data as follows to transmit the mobile radio signals or mobile radio data:

• Direct line
• Emergency call system antenna splitter
• Direct line
• Emergency call system left backup antenna
• Emergency call system right backup antenna

The emergency call antenna on model 216 is integrated into the GPS antenna.

	Wiring diagram for emergency call system control unit	Model 216	PE82.95-P-2101-97CAA
		Model 221	PE82.95-P-2101-97SAA