My dad's been out in my car, and since he's come back the boot won't open no matter what. The lock won't turn, and the boot release button on the key won't work. This has happened before when he's used it, and I can't for the life of me get it open again. Is there a boot release button inside the car? I've gone through the manual but can't find anything on it either, any suggestions as to how I can get this open?