WARNING | Disconnect the battery earth cable before working on the electrical system. |
| On vehicles fitted with telematics system, activate the service mode for the telephone/telematics control unit -J526- before disconnecting battery -A- → Chapter. |
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| 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. |
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| Telephone (fixed installation) |
| This enables all mobile telephones -R152- approved by Audi with Bluetooth interface to be operated with the phone pre-installation with aerial for Bluetooth -R54-. |
| Notes on operation and approved types of mobile phones: |
| It is not possible to connect up other devices via Bluetooth, for example headset, laptop or PDA. |
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