1) take your back wheel off. then take the two bolts out of the calliper.then the calliper will lift off.make sure your hand brake is off first.put the car in gear.
when you have lifted off the calliper stow it safely.
then remove the other two bolts from the back of the callipers cradle.when completed you have a centre hub cap. pull this off with a screw driver and take out the large centre nut.your disc should slide right out.
my megane coupe cab had ball bearings in hub dics which made it very pricey for parts at the dealers.
hope this helps you. ps you will also need brake pads too. good luck
steven mitchell, March 2009