S4 Quattro Wagon V8-4.2L (BHF) (2008)
Ambient Light Sensor: Service and Repair
Ambient Illumination Deactivation Switch E491, Removing And Installing
Where equipped, the Ambient Illumination Deactivation Switch E491 controls the "coming home " and "leaving home" lighting function.
Additional information Owners Manual
Removing
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Remove light switch.
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Reach through opening for light switch and press the switch unit out of the switch housing in direction of - arrow -.
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Disconnect electrical connection.
Installing
Install in reverse order of removal, noting the following:
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Install light switch.