​​​​​​A quick message read "key battery not detected" one day but I was still able to get the doors open and the car to start. This happened for two days. I forgot to mention that before this happened the knob would sometimes stay up when I turn off the car. By the fourth day I discovered that I can't get the doors to open and my key fob does not work even though I changed the battery. I was told it could be battery. My issue may not require an expensive Jag dealership's assistance. Need a second opinion.