I've just got a 1995 Volvo 850 (UK). I've been trying to remove the luggage cover, the fabric cover you can pull over the load space. The owners manual says just to slide it to the left to disengage it from the right side and pull it out. The cover will move to the left, but it's still about 3/4 cm away from disengaging from the holder. Am I doing something wrong or is it defective in some way? Thanks John