I can't understand why even if the door locks didn't operate why you could not open the Windows? Roof motor wouldn't work either?First post here, have had a Z4 since new, got imprisoned in my Z4 the other day after a combination of it appears the GM5 unit failed and a loose battery connection. Anyway in this situation you become a prisoner in your own car, both door handles and locks would not work, key in car with me so no one could help from outside. End result, I had to kick the passenger window out from the inside to get out of car.
On first reflection this sounds amusing, but on consideration, could in some circumstances be absolutely lethal.
I contacted BMW U.K. as regards this matter because I consider it a lethal design fault of the car, their response was absolutely shocking, basically politely they said it is no longer under warranty and they do not care about the safety issue and thus consider the matter closed. My car is probably going up for sale or being sent to the scrapper as I now consider it a death trap.