[suspenceful]

I recently bought an 08 135i and have a few general questions.

First off, is there any way to pair my iPhone with the car? The car has iDrive, navigation, etc. After scrolling through everything, I can't seem to find anything.

Also, I have comfort access and it oftentimes doesn't detect the key. Is it normal for the key to lose signal strength over time? Are there batteries I can replace? It usually unlocks for me as I come up to it, but sometimes doesn't lock/open trunk when I want it to. About half the time, I have to take the keys out of my pocked and put them in the center console to start the car because it doesn't think the key is in there...