Easy, pop bonet and open, loosen top off breaking fluid resivoir (you`ll see later) then Usual wheel removal techniques.
i.e. handbreak, Crack nuts off wheel, Jack up, support vehicle (put wheel under chassis)
Each caliper is held at top witha bolt (7mm af allen key) Do Not Remove.
At bottom of caliper (towards the front) is a pair of pins that hold the caliper in place, these need to be removed. The 1st pin (like a peice of wire) can be removed carefully with a plyers trying not to destroy it. This allows the 2nd pin to be removed. This id done by driving it towards the engine bay. Usually a few taps with a hammer and a sturdy small screwdriver will suffice. sometimes a spray of Plus Gas or and reaseoil (don`t get on disk though) will suffice.
Then swing the calliper forwards and up and hey presto!
To get new pads in there the piston has to be pushed right back into the housing, you can either use a special tool or by using firm pressure you can press it in by hand. (thats why the resivoir lid is off!) Put new pads in and rebuild. I normally clean it all down with a wire brush while the wheels off.
Don`t forget to put the cap back on the resivour once done and start the engine and pump the breaks before pulling off (this pushes the pads back up close to the disks and prevent and freights and accidents.
Good luck
yoan, February 2005