Your garage door opens sporadically. I could not get the thing to work at all. My Cayman makes all the right light flashings, but the door won't open or close. We have owned 5 different cars (4 Subaru 1 VW) and they have all worked fine. With my Porsche, no go.
Our garage door opener is a LiftMaster/Chamberlain. I got my car in December and tried to get this to work many time during the first 2 months of owning my Cayman before I gave up. It was to cold, and I ran out of patients.
I contacted LiftMaster/Chamberlain tech support and the representative walked me through the very same steps I tried. She gave up saying that I needed to take my car back to the dealer because the Homelink control unit in the car must be defective. Since so many Porsche owners were experiencing this problem, I figured taking it to the dealer would probably be a waste of time.
I added a piece of velcro to the back of the Liftmaster remote, then stuck the remote to the fabric inside the front driver's door pocket. I'm sure I will try again.