Has anyone changed their anti freeze in their Copen 1.3 model? My wife's car is now 6 years old and I intend to replace the anti freeze/ inhibitor. Is this a straight forward job of putting the heater on open (hot) and draining radiator and block then re-filling via the expansion tank. Any advice is welcome as some cars have precise methods to do this. Also the inner side of both brake disks are corroding again. (Second set fitted under warranty). So now the car is out of warranty which after market discs are the best to purchase? As the car has passed the MOT this month with a advisory about this I will replace them in the spring along with new pads. Dinko