Although I haven't hit this problem yet, in good old BMW Z4 tradition, I can feel one coming on. I have a facelift bumper to go on anfd have sourced facelift surrounds so all I need to do now is to fit my facelift lights, but I am sure I have read somewhere that you need to have the rear lights programmed to work in a pre facelift car, can anybody enlighten me on this or is it just a figment of my imagination