Solar Sensor (IHKA High Only)
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The solar sensor is located in the middle of the dashboard. (The installation position of the solar sensor in the E63/E64 has been turned through 180°.) This sensor is only active in automatic mode. The solar sensor takes external sources of light or heat (e.g. direct sunlight) into account, which could affect the air conditioning of the vehicle interior.
The sensor consists of 2 photoresistors. The sensor supplies the IHKA control unit with analogue signals for the driver's and front-passenger sides. The signal depends on the intensity of sunlight.