It's been pretty hot here in the UK and as my car had been in the sun all day I thought it would be a good idea to use the 'global' function on the key. Bad idea - one of the rear window regulators broke and the glass disappeared into the door.. I have to leave it at the airport in 24 hrs so I had to strip the door to wedge the glass up. Bit unpleasant in 30°c sunshine. New regulator on order.