So just bought my first Porsche C4S which I collected last month from OPC Glasgow . Had it for 3 days before I had to go back offshore for 2 weeks but the night before I left it was snowing but I garaged the car and thought nothing of it . Returned home this week and the brakes had stuck to the disks , nothing unusual there , has happened with both my previous cars , Audi RS5 and RS7 . The brakes freed off with very little effort but were initially noisy with the rust built up but now I seem to have a real problem . On feathering the brakes from 60-70 mph I'm getting feedback through the pedal that I'm driving over cats eyes , feels like a warped disc ? I've driven 150 miles now and it's not improving , thought it may be pad residue but usually this disappears under heavy braking . I discussed with OPC Glasgow and they said it sounded like a warped disc but it wouldn't be covered under warranty , I've only had 3 days driving use of the car and it may need a replacement disc , not a good start , car only has 6k on the clock . Anyone with any similair experience or advice ?