Yesterday when pulling out of a petrol station my rear glass hatch release activated and the luggage cover retracted. At the time I thought maybe I just hadn't closed it properly but it happened again later in the day. After a bit of research on BMW Land I discovered this was a common problem and either meant a problem with the wiring or more likely, the hatch switch. Since the new switch was reasonably priced, and was the most likely cause, I decided to replace it.