Hi guys, I’m looking at getting a rcd330 and they say you have to update the gateway to avoid battery drain. I already have a satnav in my car so will I still need to do this? Not sure which one it is but I’ve seen them in quite a few used GTi’s. It’s pretty cheap looking and needs a disc for the satnav. I’d upload a photo if I could figure out how on an iPhone! Any info is much appreciated.