Route guidance through voice output, function

General

The route guidance through voice output function is an assistance function that assists the driver without distracting him from the traffic. The destination-oriented navigation of the navigation system is primarily supported by voice outputs with the following information:

- Direction information

- Name of road onto which the next turnoff should be made

The voice output of the navigation system features the following languages:

- German

- English

- French

- Spanish

- Portuguese

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- Italian

- Dutch

- Swedish

- Danish

- Russian

- Turkish

Additional voice messages are emitted at the start of the route calculation, when an intermediate stop is reached or when the destination is reached.

Operating instructions

The radio control panel and navigation unit (A2/56) is operated using the following components:

- Using the radio control panel and navigation unit buttons

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- Using the left multifunction steering wheel button group (S110) and the right multifunction steering wheel button group (S111)

 When voice output is active the announcement volume can be adjusted using the following components:

- Using the volume control on the radio control panel and navigation unit

- Button + and -, adjustment of specific functions and volume control (S111s1)

 The audio output volume is dynamically aligned with the noise level inside the vehicle (speed-dependent volume control (SDV [GAL])).

 A special note is given during voice output in the following cases:

- Destination in area not accessible by car

- Destination in area with restricted traffic access

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- Route via ferry

- Route via toll road

Function requirements

 Status "Circuit 30 ON" or "Circuit 15R ON"

 The Auto pilot system (APS) is working correctly

 Up-to-date navigation data available

 Vehicle is underway and destination-oriented navigation is active

Function sequence

The radio control panel and navigation unit combines the word segments into complete instructions or information by means of the integrated navigation processor during a voice output and generates low frequency (LF) signals. If required, the low frequency signals are forwarded via the Media Oriented System Transport (MOST) to the amplifier for sound system (N40/3), with code 810 Sound system, where they are then amplified.

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The low frequency signals are sent from the amplifier for sound system to the following speakers via direct lines:

- Left front door speaker group (H4/1)

- Right front door speaker group (H4/2)

- Center cockpit speaker (centerfill) (H4/27)

 On vehicles without code (810) Sound system, the voice output is performed via the radio control panel and navigation unit using direct lines to the speakers: