If you have to keep your window open in the rain, duct tape a folded up cloth over the switches in the driver's armrest. Otherwise you will get the aforementioned streams of water directly onto the switches. They then sot working...
That is why I have one window open in the pic.
The pice of clothe works fine, because the water doesn't flow
E92 M3, Competition Package, MDCT, Ground Control Adjustable Camber plates, StopTech 380 BBK, OEM exhaust mod