My Jetta 2000 TDI remote door key didn't work yesterday (All three buttons are dead). Since I worked very far from home, I didn't get around to replace the batteries last night. After about 18 hours later, I bought two new batteries and put them in. All the buttons still don't work. I am thinking maybe I left the remote key out of power too long and needs to be reprogrammed. Is there some instructons anywhere how to do it? Thanks