Tando

Hi Guys, I have a problem with my 2012 Jaguar XF. It doesn't unlock sometimes and this happens mostly in the mornings. You can open the drivers door but the alarm goes off. I thought it was the remote battery, I changed it and the issue still continued. I also changed the car battery because this issue only happens in the mornings and it still didn't fix my problem. Sometimes when I drive the car the power goes off and it shuts down everything that works with electricity(radio, I can't open windows...) while it's still on. And it also shows funny errors, like there's no fuel in the car, brakes, blind spot checker not working. This issue doesn't happen all the time, sometimes the car can go for days without this issue. What might be the problem? Please help guys.