WallieX5,
1. The black grill is BMW OEM part. I got mine on e-bay. Really easy to install. Roof and trunk spoiler are from e-bay too, inexpensive aftermarket. I had them professionally painted matching black. See result
http://f10.5post.com/forums/showthread.php?t=605743
3. I hardwired V1 using instructions from this DIY section of forum. It shuts off together with ignition.