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Telematics system - overview > < Telematics system
General notes
General notes
  WARNING
t  Disconnect the battery earth cable before working on the electrical system.
t  On vehicles fitted with telematics system, activate the service mode for the telephone/telematics control unit -J526- before disconnecting battery -A- → Chapter.
When re-connecting battery -A-, always adhere to correct sequence for connecting and disconnecting battery -A- → Electrical System; Rep. Gr.27. Deactivate the service mode for telephone/telematics control unit -J526- → Chapter.
  Note
t  If SIM card is defective, request a new one by fax:
t  Hotline No.: 0800/2 83 47 27
t  Fax No.: 0800/9 63 96 39
Description
The telematics system combines traffic information, the service call and the emergency call functions.
The telephone/telematics control unit -J526- also always includes a mobile phone.
If necessary, an emergency call or breakdown call can be made via a telematics service centre. With Telematics II, it is also possible to call up current traffic information.
The telephone/telematics control unit -J526- determines the exact position of the vehicle using GPS data, which is then also transmitted to the telematics service centre.
An emergency call is made automatically if the airbag control unit -J234- triggers a crash signal.
Fault finding is performed via the “Guided Fault Finding” → Vehicle diagnosis, testing and information system VAS 5051.
Aerial wire repairs → Electrical system; Rep. Gr.97.
CAN bus wire repairs → Electrical system; Rep. Gr.97.
   

Telematics system - overview > < Telematics system