Originally Posted by Stohlen
what does it do exactly. Sorry to be filling up your thread with uselessness
No worries. It shows a little picture of your car on the nav screen with a radar color gradient and beeps when you get close to objects. Though I just found out this is the limited extent of the PDC on the 135i. On my friends X5 its a full camera with on screen radar... it's nuts.
So with this knowledge, might just forget it...