Ok, so you have same setup like I have, w/o DSP w/o NAV. I just installed the Basslink, took about 4-5 hours. Some companies would have taken about 200 USD for installation, so I decided to do it by myself. I have BMW TIS manual in use and it helped a lot.

If you will have any questions, please do not hesitate to send PM for me. You can find wiring diagrams etc. from online WDS (plug connector X10266, A18 amplifier pin assignments ect.) and you can find basic installation setup from www.infinitysystems.com web page.

Good luck!