I just purchased a 97 SL500 and really like it. However, there is one item I am hoping someone may be able to help me with or provide me with some guidance. I have followed the directions to a "T" in the owner's manual for programing the garage door opener at the rear view mirror buttons. The mirror LED even flashes to indicate the frequency has been accepted, yet it does not function when pushed to operate the garage door. Is there a secret to programming the mirror button that I do not know about? No biggie, but it would be nice to get it to work.