I just had mine installed today. Yes, I paid the dealership to do it just to be 100% safe. Mine is from Touratech and hooks up to the battery terminals and the rear brake light therefore it only powers up when the key is in ON. So far I have a Radar detector and some PIAA lights hooked to it with no worries.
The Can Bus puts a bump on the road when it comes to ease of installations but its easily circumnavigated.