Mine did this. I re-secured the button with two small blobs of black silicon gasket maker at the two central pivot locations - has worked fine for six years and looks perfect.

The white bits in the holes are LEDs. The switch action comes from pushing a small actuator below the small square frames sections...

(edited)

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Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)