Some companies already made a little box to sell...
I don't know if it's good to post what I did, it's not good for their business. Here is a hint. All you need is a simple 12V relay - I use electronic relay that cost less than automotive relay. Anyhow, everytime you press the remote, at the trunk latch, the green wire will go high and back to 0. This will be your relay trigger.
Next, the switch button to close, the 2 center pins (2-3) will short together when you press the switch. Therefore, these 2 pins will be connected to the outputs of the relay.
<a href="http://www.dognmonkey.com/audi/close-trunk-lid-remotes-door-button-a8l.html">I'll post some pictures later</a>
Last edited by ltooz_a6_a8_q7; 05-26-2014 at 04:45 PM.