Master Key Battery Question
Okay, so I know that the later model E39s with the diamond keys had batteries that recharged when in the ignition, I find no evidence of this on the '97. So the thing that is happening is when I tried to lock it with the button on the key when I went for dinner tonight, nothing happened. So I locked it by putting the key in the door, and it worked fine. I then proceeded to unlock it with the button on the key and pop the trunk with the button on the key successfully. Please tell me for some reason a low battery would cause this, because I like not having to put the key in the door every time I lock it, and I am not willing to spend money on a new key at this point if it will lock in some manner.
I wish I could find my second master key, but it got lost in the move from my old house to the one my parents live in now.