Picked up the Sirius kit from Bavarian Soundwerks. Installation of the Sirius receiver was a piece of cake. It only took 30 minutes if that. The CD Changer cable, included with the kit, helps integrate the Sirius receiver using a daisy-chain approach. Note I did not install the Sirius receiver in the spare tire compartment as others have done. I piggy-backed mine on top of the CD Changer itself. By the way, the CD Changer can be removed very easily by unscrewing the 4 bolts (1 at each corner) and it just slides out. Mount the Sirius receiver using the velcro tape included with the kit and slide the CD Changer back in. See photos below.
The antenna was a different story since I wanted to mount it inside the spoiler so it's not visible. This instructions article form IFlyX5 was extremely helpful.
http://www.xoutpost.com/articles/x5/s...avigation.html
Only difference is that I installed the antenna on the left side of the spoiler and I did not use a metal plate as others recommended. Its location (see pic below) is ideal since the antenna is facing straight up as opposed to being at an angle. The antenna included with the kit has a very low profile and the radio's reception is excellent. Everything works very well with the steering controls and the sound quality is great!
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Warning, I'm prone to sudden attacks of enthusiasm
In the garage
2008 Infiniti G37S Coupe (Traded)
2011 BMW X5 xDrive35i
2011 BMW X5 xDrive50i