Intermittent radio at start up.

[Grady609]

Hey guys
I have an 05 base cayenne which I simply love. Problem is lately when I start it first time in the mornings the radio may or may not come on. The weather has been cold for this area of Alabama and that's when it started. When the weather warms no problem unless it's dark and cold again. Any clues?
Thanks

[RNajarian]

Every time my radio acts up it is a bad battery . . .

http://forums.pelicanparts.com/porsche-cayenne-macan-forum/782733-haunted-cayenne-crazy-electrical-malfunctions.html