BMW OEM HOMELINK E39 E46 M3 M5 528i 540i 325i 330i 530i
Because it is not just a Garage Door Opener...
Basically if it plugs in and/or powers on with electricity Homelink will let you turn it on and off from your car seat.
I bought 2 of these ...thru Ebay..needed one..however won both auctions..so the 2nd one is for sale. I just want to get my same money back.