Mirror taximeter/mirror odometer function

Function requirements, general

 Circuit 30 ON

Mirror taximeter/mirror odometer, general

The mirror taximeter (A50/1) is auxiliary equipment for the taxi driver to determine the fare.

The fare is shown in the inside rearview mirror (A67).

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The mirror taximeter/mirror odometer function is comprised of the following partial functions:

 Function sequence for activating the mirror taximeter/mirror odometer

 Function sequence for determining the fare

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Additional function requirements for activating the mirror taximeter/mirror odometer

 Vehicle standing still (v = 0 km/h)

Function sequence for activating the mirror taximeter/mirror odometer

The mirror taximeter can be activated manually via taximeter button 1 (A67s4) or automatically if the front passenger seat is recognized as occupied.

The fare is shown in the left upper area of the inside rearview mirror. At the same time, the special-purpose vehicle multifunction control unit (N26/9) shuts off the roof sign lamp (E14/4) (with code (342) Roof sign connection for taxi). The multifunction control unit reads in the signals of the mirror taximeter for this.

 The roof sign lamp is only automatically switched on or off if this function was activated beforehand in the "Taxi", "Roof sign" menu in the instrument cluster (A1).

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The load condition of the front passenger seat is defined via the front passenger seat seat occupied recognition (B41/1) (without code (U18) Automatic child seat recognition (ACSR [AKSE])) or the front passenger seat seat occupied recognition and ACSR [AKSE] (B48)
(with code (U18) Automatic child seat recognition (ACSR [AKSE]). If the front passenger seat is recognized as occupied, the supplemental restraint system control unit (N2/10) sends a corresponding signal via chassis CAN (CAN E), front SAM control unit with fuse and relay module (N10/1) and interior CAN (CAN B) to the multifunction control unit.

 The mirror taximeter/mirror odometer function can be switched off automatically if a shutoff time is set.

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Function sequence for determining the fare

The mirror taximeter uses the distance traveled as the basis for the calculation of the fare.

The distance traveled is defined via the wheel speed, which is recorded by the left front axle rpm sensor (L6/1).

The Electronic Stability Program control unit (N30/4) reads in the signals of the rpm sensor and sends these via chassis CAN, front SAM control unit and interior CAN to the multifunction control unit.

The multifunction control unit directly actuates the mirror taximeter.

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 The use of the wheel speed signal to calculate the fare is subject to the German Verification Act.

If the taxi is also equipped with a card reader and printer (A50/2) (accessories), the fare to be paid can be compared with the card payment and a receipt can be printed out.

If the display of the fare is switched to payment mode when dark by pressing the taximeter button 4 (A67s7), the multifunction control unit sends the request to switch on the interior illumination (IBL) via interior CAN to the front SAM control unit. The front SAM control unit sends this request via interior CAN to the overhead control panel control unit (N70) on vehicles with code (414) Power glass tilting/sliding sunroof. On vehicles without code (414) Power glass tilting/sliding sunroof, the front SAM control unit actuates the electronic overhead control panel (N70/3) directly.

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The IBL is then switched on in accordance with the data of the light sensor (B38/1) (without code (345) Rain sensor) or the rain/light sensor (B38/2) (with code (345) Rain sensor). The front SAM control unit reads in the data from the light sensor or the rain/light sensor via the wiper/inside rearview mirror LIN (LIN 2).

 Detailed information on the actuation of individual components of the IBL can be found in the separate function description "Interior illumination (IBL) function".

Storing journey data:

The mirror taximeter stores the following data in the journey memory:

- Journey information and journey shifts

- Stretches driven

- Processing of driving jobs