Hi, Just bough a 2nd hand C5. It seems ok, apart from two little things. 1. All the electric windows work ok, except when you use the remote to open them slightly. They all open except the drivers window. Is this normal? Or is it an easy fix? 2. Can I retrofit a sport button for the suspension, and will it work, or is it completly different suspension? Thanks for helping a C5 newbie <_<