Re: spider electric roof
Mine was doing exactly the same thing when I bought it but just fixed it. The motor in the rear compartment behind your seat houses the motor that releases and locks the cover the hood folds into. It has two cables running to it from either side of the car and is right in the middle of the back wall of the compartment.
Inside the motor is a worm screw that turns a plastic cog which produces the movement to lock and unlock the cover. It's common for the plastic teeth to sheer off after a while but the operation only uses 90 degrees of the cog's movement, so move the cog round 180 degrees to be safe, put it back together and you get another 10 years of use without shelling out £230 quid for a new motor. It's not that hard to do either. I'm an utter novice and I managed it.