I am about to pain my car and have had to remove the webasto roof - so I can avoid trying to mask the rear edges and also as the outer cover is past its best I may replace it.
Slide the roof 1/2 way back, look in between the inner and outer cover - there are 3 press studs each side carefully pop these off then ease the outer cover off them by pulling away from the car. This made everything looser and more access. I could not remove the four screws visible on the inner cover from inside the car so they will have to wait. Next remove all the slot headed screws holding the back to front channels and the alloy strip across the front of the car. Then remove the 2 posi drive screws at the rear of each channel. TIP! with the slotted screws make sure you have a very good fitting screw driver, if they are tight, put the driver in the slot and give it a couple of whacks with a hammer then start to tighten the screw, once it moves a little you can usually unscrew it ok.
Pull the roof foward a bit and look at the gap between the inner and outer covers at the rear - you will find a strip of wood covered with head cloth material going right across the car, gently pull this off the car, the wood snaped on mine but no damage to material. Now stand in the car and lift the whole roof up and back, laying it on the rear window. You can now see how the rear of the top cover is fixed to the car - remove the wire cable which is held in place by nails, then remove the posivdrive screws which run across the back of the roof, 4 of mine just snapped off, when these are released the whole outer/inner roof can be removed from the car, then lift off the seal and thats that.
Slide the roof 1/2 way back, look in between the inner and outer cover - there are 3 press studs each side carefully pop these off then ease the outer cover off them by pulling away from the car. This made everything looser and more access. I could not remove the four screws visible on the inner cover from inside the car so they will have to wait. Next remove all the slot headed screws holding the back to front channels and the alloy strip across the front of the car. Then remove the 2 posi drive screws at the rear of each channel. TIP! with the slotted screws make sure you have a very good fitting screw driver, if they are tight, put the driver in the slot and give it a couple of whacks with a hammer then start to tighten the screw, once it moves a little you can usually unscrew it ok.
Pull the roof foward a bit and look at the gap between the inner and outer covers at the rear - you will find a strip of wood covered with head cloth material going right across the car, gently pull this off the car, the wood snaped on mine but no damage to material. Now stand in the car and lift the whole roof up and back, laying it on the rear window. You can now see how the rear of the top cover is fixed to the car - remove the wire cable which is held in place by nails, then remove the posivdrive screws which run across the back of the roof, 4 of mine just snapped off, when these are released the whole outer/inner roof can be removed from the car, then lift off the seal and thats that.