changing the discs is a very easy job , remove the 2 small studs holding disc, then 2 bolts holding on caliper & pull caliper with pads in away from disc.
i always then tie up the caliper to front springs with some string so as not to put stress on brake lines.
you may have to pursuade discs off hub with a hammer or mallet, or often they will be lose enough to pull clean off.
fit new discs .
obviously you will need to fit new brake pads each side also, flick open bonnet and unscrew brake reservoir, now (if you have one) , use a small g-clamp or speed clamp to force back the caliper piston to accept the new brake pads.
(put a cloth around brake fluid reservoir prior to this step incase fluid spills over, and be sure not to get any fluid on car paint work or it will strip the paint).
put in new pads same as removed and plug in any sensor wires off pads (if fitted).
a good tip is to take some pics with your mobile on how the pads are fitted in the caliper prior to removal to see just how they fit and anti rattle springs in place, just incase you disturb them taking old pads out.
you can get excellent discs & pads from a motor factor for a fraction of the cost of dealer.
i just did my multipla discs & pads & saved a whopping £150 on an independant garage price.
remember two rules with replacing discs/pads, always do both wheels & go "easy" on braking for first couple hundred miles to allow new pads to "bed in".
hope this helps
mark
