My 2015.5 XC60 T5 has about 72,000 miles on it. It's developed a frustrating incidentalI electrical problem that the dealer has been unable to diagnose.

The first sign of trouble occurred when the key fob would not unlock the door. It opened when I took the metal key out of the key fob and unlocked the door with it. I called the dealer and the service advisor recommended changing the key fob battery. I used the other key fob and didn't have any issue for about two weeks.

The second incident was much more severe. After I filled the car with gas, I got back in and tried to start the car. Nothing worked -- the car didn't start even with the key fob inserted, the radio didn't work, the key fob didn't work, the liftgate wouldn't open -- nothing. When AAA came and attached the instant charger, the car started immediately -- just like normal.

The dealer looked at it and ran tests on it and couldn't find any problems. They agreed that starting it every day until it didn't start so they could check it again was a good idea. It's been two weeks and it's started every time.

I'm looking for any suggestions.