back in 2010, (just in time for LoS) my 2007 S3 central ocking packed up all together. The factory was unable to replace the unit as no longer manufactured so I have had to have new system installed, same as AeroSS. It now works perfectly.

Methinks that as different sytems have been used it may not be possible to get a new clicker but if you do, then I think you use the clicker to program itself to the unit in the car, but can't be certain on this
