In order to replace the battery on a Volkswagen Key you first need to disassemble your key. This takes a bit more force than most people are willing to do, for fear of breaking it.
Here is how to replace the battery and how to replace the metal bit that attaches to your keychain.
Here is how to replace the battery and how to replace the metal bit that attaches to your keychain.
http://www.riskin.org/vwkey/
