Right...
I used to own a 182 so I might be able to help a bit!
The deal with the rear brakes is that the wheel bearing is built into the disk, you can replace the whole lot or have your bearings pressed into the disk, they aren't that expensive.
Cambelt is the main thing to check, should be done every 72k or 5 years. Preferably they will have the aux belt and tensioners done as well, I had mine done when the cambelt was changed and they where about to go!
There are 2 different options, you have the full fat and the cup. The cup is the lightweight model, no leather/alcantara seats, no xenons, no aircon and no ABS are the main things. Saving about 90kg or so... probably a better buy if you are coming from a ek9. They also come with the Cup spoiler and speedline turini wheels.
Servicing is yearly, they are not too temperamental, I had no problems with mine which I kept for 12 months. Make sure you check as some are european imports, check for etched windows, locking wheels nuts and also a red alarm led to the left on the gearstick!
The main expense is tyres as they are 205/45/16 which for decent tread is about £90pc but that isn't too excessive. Some people use 195's as they are cheaper but I prefered to stick with factory spec and have as much tread on the road as possible!
Other than that just check for no whines in the gearbox etc.
Any other q's just ask..