Breakdown assistance, function - GF82.95-P-2020LEU
MODEL 216 with CODE (359) TELE AID emergency call system as of model year 09/YoM 08
MODEL 221 with CODE (359) TELE AID emergency call system as of model year 09/YoM 08
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 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 telediagnosis 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 now initiate effective remedial measures taking other vehicle-specific data into consideration.
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)
Breakdown assistance function sequence
The telediagnosis 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 via the following route:
- Direct line
- Frequency switchover control unit (N96), model 221 with code (389) Mobile phone preinstallation with universal interface, USA/Canada
- Emergency call antenna (A2/52), model 216
- Telephone and GPS roof antenna (A2/49), model 221
The emergency call antenna is integrated in the GPS antenna (A2/49a2) in model 216.
As long as the breakdown assistance is active, the light-emitting diode (LED) integrated into the telediagnosis button flashes. This is also indicated in the instrument cluster (A1) and on the COMAND display (A40/8).
If the telephone and GPS roof antenna, model 221, or the emergency call antenna, model 216, fails (e.g. malfunction caused by rollover) the emergency call system control unit transmits and receives the mobile radio signals and data via the following route in order to transfer mobile radio signals and mobile radio data:
- Direct line
- Emergency call system antenna splitter (A2/25)
- Direct line
- Emergency call system left backup antenna (A2/54)
- Emergency call system right backup antenna (A2/55)
In the event of breakdown assistance, other vehicle-related services (e.g. MB-Info call) are interrupted.
Function sequence for remote destination feed or points of interest (POI)
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 controller unit (A40/3). A facility for starting navigation directly or saving the address in the destination memory is provided in the form of a pop-up.
The service center sends the address of the workshop via mobile radio signals and data via the following route:
- Emergency call antenna, model 216
- Telephone and GPS roof antenna, model 221
- Frequency switchover control unit, model 221 with code (389) Mobile phone preinstallation with universal interface, USA/Canada
- Direct line
- Emergency call system control unit
- Diagnostic CAN
- Central gateway control unit (N93)
- Central CAN
The customer confirms receipt of the workshop and can then start the navigation.
Detailed information on starting the navigation is given in the specific system description for the COMAND controller unit.
The displays for remote destination feed or points of interest (POI) are shown by the emergency call system control unit on the display of the COMAND controller unit via the following route:
- Diagnostic CAN
- Central gateway control unit
- Central CAN
- COMAND controller unit
- Low voltage differential signal (LVDS) line
| Electrical function diagram for breakdown assistance, function | Model 216 | PE82.95-P-2068-97CAA | |
| Model 221 | PE82.95-P-2068-97SAA | ||
| Instrument cluster, component description | A1 | GF54.30-P-6000LE | |
| COMAND controller unit, component description | A40/3 | GF82.85-P-3136LEU | |
| COMAND display, component description | A40/8 | GF54.30-P-6110LE | |
| Central gateway control unit, component description | N93 | GF54.21-P-4170LE | |
| Emergency call system control unit, component description | N123/4 | GF82.95-P-3212LEU |