If you don't have a code reader etc that will allow you to open the boot when the roof is playing up, these methods have both worked for me, you'll want to make sure your roof is in a position where opening the boot isn't going to cause any damage! Boot access is needed to get to the electrical gubbins and to the pump should you wish to release the pressure to move the roof manually.
Option 1: I’ve done this successfully when the rear screen part of the roof freezes on top of the roof with the boot fully closed. Locate the Hall Sensor on the right hand side ram, put a metal object on the top of the sensor and pop the boot with the key fob……
Option 2: Firstly I got this info elsewhere, I didn't put it together but I have followed the process and it works. Keep in mind doing this is at your own risk! It's a hack but it could get you out of a tricky situation.
Step one - get to the fuse box and locate the connector shown on the underside of the fuse box, it's a long black one with a slide release on the back next to the firewall - X14270

Locate pin 12 - indicated by the red wire

Lower the fuse box and slide it all the way forward and locate the blue 60amp fuse

Connect a tester or similar - a length of wire works - between pin 12 and the blue fuse as shown, you'll hear the boot lock disengage and you're in!
Option 1: I’ve done this successfully when the rear screen part of the roof freezes on top of the roof with the boot fully closed. Locate the Hall Sensor on the right hand side ram, put a metal object on the top of the sensor and pop the boot with the key fob……
Option 2: Firstly I got this info elsewhere, I didn't put it together but I have followed the process and it works. Keep in mind doing this is at your own risk! It's a hack but it could get you out of a tricky situation.
Step one - get to the fuse box and locate the connector shown on the underside of the fuse box, it's a long black one with a slide release on the back next to the firewall - X14270

Locate pin 12 - indicated by the red wire

Lower the fuse box and slide it all the way forward and locate the blue 60amp fuse

Connect a tester or similar - a length of wire works - between pin 12 and the blue fuse as shown, you'll hear the boot lock disengage and you're in!