Just checked mine, light load, 225/40x18 rosso's F38, R35. The "17" tyre pressures are lower, don't understand all the different one's for the 18's though, maybe it's a tyre/engine thing? Also the 3.2 (from memory is 60 kg's heavier?) so you already have a passenger effectively sat right in the middle of your bonnet! I know when we put a set of H&R cup suspension on my lads Golf TDI Mk4, there were different part numbers between TDi and normal stuff, could only be a weight thing foir the heavier TDI lump.