BMW 330i DSC indicator "on"

Does anyone know what problem may cause this indicator to come on? How can I fix this? How to disable the warning light and drive without the DSC?
Thanks.
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If the light is constantly on, it may be the DSC is deactivated. The light can be turned off the pressing the DSC button, which is located above the astray console. This will reactivate the DSC.
However, it's normal if the light flashes on and off while driving which indicates the system is in use.
William
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