| Navigation system IV is an enhanced version of the familiar navigation system III. |
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| Retention of features from navigation system III |
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| Provision of telematics link |
| Navigation system BNS 4.0 (Nav IV) is an enhanced version of the familiar navigation system III. |
| Key innovations include a link with the CAN bus (infotainment) and dynamic navigation. |
| The system obtains dynamic navigation information from the radio TMC function or via the telephone. |
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