The cause is the proximity of the Comfort Access fob. You need to have it about 20' away. I have even experienced activating the locks by using the water hose when the fob was in my pocket.
2013 Porsche Carrera 4
2011 Panamera 4S; 2012 Mini CooperS
Prior BMWs: `05 645CiC; `07 650i; `08 M6 convertible; '08 135i; `11 750ix MSport
"You think that's air you're breathing now?"