Taken from the web............
Yes, the FOB separates. You have to pry off the VW emblem with a box blade, or some thin-type of blade so as to not scratch the emblem. Underneath, you will need a small jewel philips head screwdriver for the small screw. Take out the screw and then the pieces will separate. It is also better to have the flip opened so that the blade won't fly away!!
Further, when you reassemble, make sure you do not lose your transponder chip, AND make sure you wind the blade at least one time on the spring in order to have the tension to flip open.
This is also a GREAT way to transfer your already programmed transponder into a new FOB/Remote after you have the blade cut. Then, just follow the remote programming instructions in your owners manual.
I need to add... DO NOT DAMAGE YOUR TRANSPONDER LIKE I DID !!!.