Originally Posted by tom2112
Well, one thing that the author failed to mention is that you have to be EXTREEMLY careful when opening the case. If you are not careful the red lens portion of the case will snap the transmitter LED off the PC board of the remote. Once you do that, you may as well light it on fire for all of the use it will be. I know this from experience.

Ummm, the LED on our remotes serves as a battery check indicator only. The remote uses RF to lock/unlock the car. The single button model of the remote was IR, that was used on earlier MB models.
It's pretty easy to tell the difference since you can keep the RF remote in your pocket and still use it. The IR remote has to be pointed at the little receiver window next to the lock for it to work.