this is 2016 FFE. when turned off the engine, the car was dead immediately, no light on dashboard, remotes did not work. this happened several times recently. I jump started the car and drove it to dealer to check out the battery. battery checked out good by dealer. I drove back and it worked fine for a few days and then it shut off again. now after two days just parking in my driveway , the small 12V battery still read 12.5V so I think the small 12V batter is alright but the car remote won't work. I opened the door using the key and car won't start, no dashboard. if it isn't the battery, what would it be?
Thanks you for your input.