I did this last night and it worked well. Having a socket wrench with a u joint is a must for accessing the grounding bolt, since you do not have direct-line access to it.
A thin wire is recommended, since it is a tight squeeze behind the green and white wire. It doesn't look like there's much room, so you pretty much have to shove it in there and hope it makes a connection.
I did not find it necessary to remove all of the connectors, only the one I was tapping into.
Lastly, in order to test whether the radar detector, lights, sunroof, etc. work you have to plug the connector back into the console. Other than that, great DIY!
Should take no more than 45 min. I took long since I was also overly careful, as with anything I do on my car.
2007 335i Sedan, Black with Saddle Brown Leather, Steptronic, Sport, Premium, and Cold Weather packages.
Previous BMWs: 2005 Mini Cooper S, Sport Pkg. Pepper White/Black w/ Black interior (sold)
Last edited by MiamiBimmer; 04-12-2010 at 11:14 AM.