The power windows not lowering when the Cabriolet top latch and/or door handle is operated or lowering unexpectedly while driving can be caused by a failing Cabriolet top or door handle micro switch. Diagnoses will be required to determine which switch is at fault and will require replacement.Google+
Car Problem Reports
Porsche Boxster Power Windows Won't Lower Due to Failing Cabriolet Top/Door Handle Micro Switch
Porsche Boxster Problem
Average Mileage: 79,250 mi (43,500 mi - 117,000 mi)
Visitor, 2000 Porsche Boxster, 84,000 mi
car went to body shop for hail damage. Now the windows do not open slighly when door handled opens.
Power window won't lower.
Visitor, 2001 Porsche Boxster
no drivers window movement
Visitor, 2009 Porsche Boxster, 117,000 mi
window lowers and then rises once door on drivers side opens. Thus when the door closes the window is still in the fully extended position coliding with the door frame.
Visitor, 2003 Porsche Boxster, 43,500 mi
Both doors have experienced multiple relay replacements, and the whole mechanism once on the drivers door. Door lockin mechanis wear area is made of plastic and eventually wears through and binds