Does anyone have information regarding how to install a subwoofer in an 2009 e70? I searched the forum and found information on older models as well as complete stereo overhaul. However, I have not found much on the e70 and more specifically information on adding a subwoofer (with built in amp) ONLY!

Am I nuts? Is this possible?

Wiring pinouts, pictures, etc would be greatly appreciated. Depending on the information I receive, I plan to complete the install over the New Years break and will be sure to include lots of pictures.

Thanks