Breakdown assistance, function - GF82.95-P-2020GQU

MODEL 164.1 with CODE (359) TELE AID emergency call system as of model year 2009/Modification Year 2008 model refinement package 

MODEL 164.8 with CODE (359) TELE AID emergency call system as of model year 2009/Modification Year 2008 

MODEL 251.0 with CODE (359) TELE AID emergency call system as of model year 2009/Modification Year 2008 

MODEL 251.1 with CODE (359) TELE AID emergency call system as of model year 2009/Modification Year 2008 

Function requirements 

• Circuit 30
• Emergency call system authorized and operating properly
• The vehicle-related breakdown assistance service is separately authorized
• An emergency call system control unit (N123/4) communication module authorized for the vehicle-related breakdown assistance service is configured ex-factory with the telephone number of the corresponding service provider
• The customer is registered and authorized at the service center
• One mobile phone network is available in sufficient strength and quality
• Actuation of breakdown assistance by pressing tele-diagnosis button (S93/6s2) > 0.5 s
• A higher-priority vehicle-related service is not active

General 

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 then perform remote diagnosis of the actual situation and initiate effective help measures, in consideration of further vehicle-specific data.

The breakdown assistance function consists of the two following subfunctions:

• Breakdown assistance function sequence 
• Function sequence for Remote Destination Feed or Points of Interest (POI), with code (512) COMAND APS with DVD changer 

Breakdown assistance function sequence 

The tele-diagnosis button is read in by the emergency call system control unit over a discrete line. 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 sends an SMS with the following data to the service center over the integrated communication module:

• Vehicle position
• Customer identification data
• Vehicle identification data

The communication module integrated into the emergency call system control unit transmits and receives the mobile phone signals or data in the following way:

• Direct line
• TELE AID antenna (A2/93a4)

As long as the breakdown assistance is active, the light-emitting diode (LED) integrated into the tele-diagnosis button flashes. This is also displayed in the instrument cluster (A1) and on the display on the COMAND operating, display and controller unit (A40/3).

In the event of a malfunction of the TELE AID antenna (e.g. defective due to rollover), the communication module integrated into the emergency call system control unit automatically sends and receives the mobile phone signals and data via the TELE AID backup antenna (A2/50).

In the event of a breakdown assistance, other vehicle-related services (e.g. MB-Info call) and on model 164 with code (389) Mobile phone preinstallation with universal interface, USA/Canada, any active mobile phone connections are interrupted.

Function sequence for Remote Destination Feed or Points of Interest (POI), with code (512) COMAND APS including DVD changer 

In the event of breakdown assistance, it is possible, for example, to load the address of a workshop into the navigation module of the COMAND operating, display and controller unit. The service center sends the address of the workshop via mobile phone signals and data over the following path:

• Direct line
• TELE AID antenna
• Emergency call system control unit
• Diagnostic CAN
• Central gateway control unit (N93)
• Interior CAN
• COMAND operating, display and controller unit

The customer confirms receipt of the workshop and can then start the navigation.

Detailed information on starting the navigation is given in the system description for the COMAND display, operating, display and controller unit.

The displays for Remote Destination Feed or Points of Interest (POI) are shown by the emergency call control unit on the display of the COMAND operating, display and controller unit over the following path:

• Diagnostic CAN
• Central gateway control unit (N93)
• Interior CAN

	Electrical function diagram for breakdown assistance, function	Model 164	PE82.95-P-2068-97MAA
		Model 251	PE82.95-P-2068-97RAA
	Instrument cluster, component description	A1	GF54.30-P-6000GM
	COMAND operating, display and controller unit, component description	A40/3 With code (528) COMAND including DVD changer without navigation With code (512) COMAND APS with DVD changer	GF82.85-P-3134GQ
	Central gateway control unit, component description	N93	GF54.21-P-4170GM
	Emergency call system control unit, component description	N123/4	GF82.95-P-3212GQU