The Euro fender heights are only useful if the full diameter of your tires are the same as the tires that came stock with the car. Since sidewall heights vary so much when you change wheel diameters, you have to use a
tire calculator to see what the difference is, split it in half, and adjust the Euro height numbers with the result.
Edit: This isn't a huge deal for your car, since your 17-inch sizes are very close to the originals.
Stock for SC were 185/70x15 in front (optional on Fuchs were 205/55x16) and 215/60x15 in back (optional on Fuchs were 225/50x16). So:
185/70x15 F = 25.2"
205/55x16 R = 24.9"
215/60x15 F = 25.2"
225/50x16 R = 24.9"
Where you have:
225/45-17 F = 25"
255/40-17 R = 25"