As above, depends on the year of your car.
If its less than 2008 you will probably need a CAN Gateway upgrade to be sure.
Not too hard to fit as long as you don't mind being upside down on your back with a brake pedal in chewing distance
Seriously though, if you have someone local with VCDS, they can scan your CAN Gateway and find out which version, in turn whether you need to upgrade it.
Sean
PS> Good shout on the RNS510 :)