All windows opening by themselves!

[Socr8s]

Last night went out to the carpark to find that all the windows on my 118d ( new as of last month) had decided to open themselves and let the rain in to soak all the upholstery. Last went out in at about 3pm and locked it normally. Alarm had not gone off and there were no signs of any exterior damage. All the doors were locked. Was chatting about it today with one of our receptionists and she had something similar happen in her 3 series.

Anyone any ideas as to why this happened? I would do a search but its under maintenance at present. Many thanks

[Socr8s]

Thanks, maybe it got caught in my pocket