Driving backwards in the carpark did not help so over the weekend I removed the rear pads and yes, they were seized in the caliper so unable to move. There was some copper grease on the pad backs/anti squeal shims to stop noise but none on the sides. The pads took a bit of effort to remove, had to hit with a hammer and long screwdriver from the bottom to knock them out - there is probably a puller to do this. Removing the backplate on one side gave more access. Cleaned everything up, applied copper grease to caliper contact parts and the back and sides of the pads and then refit. The discs appeared central in the calipers so did not consider removing these. Apart from the pads being seized, there is nothing special/difficult in pad removal. They are accessed by removing a 3 inch square cover - slacken an 8mm headed long bolt, lift off the cover, check the position of a pad tension spring then remove the bolt. The pads and shims should now pull out. Whilst I was at it I also removed the front pads and cleaned these up, these were also partly seized in the carriers so lots of cleaning up and application of copper grease. To help pad removal I cleaned up the contact area where the pads rest in the carrier, but still needed a bit of force from the screwdriver and hammer (and levering pad small springs in to the pad). Something to be aware of, to access the front pads, the lower caliper retaining screw is removed and the caliper is pivoted up and tied back after pulling out the handbrake cable. First the outer pad wear indicator wire has to be removed. Best way is to lever/push it from the friction side to get it to move and then pull from the outside with pliers being careful not to pull the wire out of the white plastic bit (as I did). The inner pad wire can be removed easier once the pad has been removed from the carrier. Does anyone know if the front pads/handbrake is adjusted on the caliper prior to adjusting the handbrake cable ? On the Saabs I have had, the handbrake works on the rear pads and these are set to the disc by an adjuster screw which is covered by a bolt plug on the caliper. This was probably the first time the alloy wheels had been removed since manufacture 2 years ago and they were all seized on to the hubs due to corrosion between the 2 metals. I used a long piece of 4x2 wood to hit the tyres (not the alloy wheel rims) on the inside to knock them off. Cleaned up before refitting and used a bit of copper grease on the contact parts. If I had to replace a wheel before this then it would have been a call to the RAC. This is a well known problem with alloys and something to be aware of on any car.