I'm having a bit of trouble with my keys too. First of all, the main one I use stopped working. I assumed the battery was flat, and used the spare in the meantime until I got a battery for it. Then, the spare stopped working too, so I got a couple of batteries, changed each one and did the re-sync as described in the owners manual in turn. The main key seems to work again ok, but I can't get the spare working! It just seems to be completely dead. I did the re-sync as described on another post on this forum (which seems to differ from the way it's described in the manual), but that hasn't worked either...
Any advice appreciated.
Jon