E 320 Sedan (211.065) V6-3.2L (112.949) (2004)
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Component Identification
GF82.25-P-3010T Roof Sign Lamp Actuation, Function
GF82.25-P-3010T Roof Sign Lamp Actuation, Function
- with CODE (450) Taxi version
Function prerequisites
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No overvoltage or undervoltage
With the roof sign lamp function, it is possible to connect the roof sign lamp (E14/4) to the special vehicle multifunction control unit (SVMCU [MSS])
(N26/9). The taximeter actuates the roof sign lamp (E14/4).
A distinction is made between two different taximeter types:
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Conventional discreet taximeter
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Mirror taximeter with actuation via RS485 bus
Roof sign actuation of conventional taximeter
The connection between taximeter (A50) and special vehicle multifunction control unit (SVMCU [MSS]) (N26/9) is provided via discrete lines. The
taximeter (A50) actuates the roof sign lamp (E14/4) through activation of the "roof sign control line" input. The actuation of the roof sign lamp (E14/ be
activated or disabled at the multifunction steering wheel. activation or disabling is transmitted by the instrument cluster on the CAN-interior.
Via STAR Diagnosis, the disabling in the special vehicle multifunction control unit (SVMCU [MSS]) (N26/9) can be switched off. This permits
taximeters to be connected, which have the roof sign button installed in them directly. The special vehicle multifunction control unit (SVMCU [MSS])
(N26/9) then no longer evaluates the status of the roof sign button in the steering wheel. The taximeter links the internal status of the roof sign button
with the taximeter status.
If the actuation at the multifunction steering wheel is activated:
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Roof sign lamp (E14/4) lights up, if the taximeter (A50) signals "VACANT"
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Roof sign lamp (E14/4) goes out, if the taximeter (A50) signals "COUNTER MODE"
If the actuation at the multifunction steering wheel is disabled:
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Roof sign lamp (E14/4) goes out
When the roof sign lamp (E14/4) is switched on, current at the roof sign output is measured. It can be detected in this way whether the roof sign lamp
