A while back I built a little module to open/close my garage door using a factory switch. I decided to pulse the wire twice to activate it. Now when I pull up to the house I can just rock my seat heater On-Off-On-Off and the garage will open/close. I liked the simplistic look of the OEM mirror and didn't like how big and bulky the Homelink mirror is. This was also $200 cheaper
...as promised, here is the video.
[ame="http://www.youtube.com/watch?v=CESmo7ztT9c"]Stealth Garage Door Opener - YouTube[/ame]