I think this is kinda weird. I'm pretty sure that the HomeLink transmitter is somewhere near the front bumper of the Model S.
At the end of the day when I am returning home, heading towards my garage door, I can use the HomeLink button to open the door just fine. However, once I pull into the garage, the HomeLink transmitter seems not to work any more and I can't close the garage with it once my car is inside the garage, so I have to close it using the button installed on my garage wall.
Now the strange thing is that in the morning, I can open the garage door from within the car, and it works consistently every single time. And of course, the car is in the exact same position that it was yesterday, when I couldn't use it to close the garage.
The one thing that could explain this is if when the garage door is open, (which means it is on the rails above the car) then the door obstructs line-of-sight between the transmitter and the receiver, but the thing is that it doesn't. The garage door is only over the rear half (or less) portion of the car. And also, the garage door opener unit (with the receiver) is at roughly the same elevation as the rails the garage door moves on.
Does this behavior happen to any one else?