If you have Sirius then you just need to order the pass thru cable. Then then pass thru cable plugs into the Sirius and you plug the iPod directly into the pass thru. The rest of the install is 100% the same. It actually ends up being easier because you don't have to search out the 3pin and 6pin!

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2009 E70 X5 - Third Row - Rear DVD
Past - 04 4.4i Sport Package