Hello, the remote control on my 2018 Partner Tepee didn't work last time. I manually opened the door, and when I inserted the key into the ignition and turned it one notch, the central locking engaged, but the date and time were reset. Anyway, I fixed that, started the car, and went shopping. I opened and closed the car with the remote without any problems. When I came back 15 minutes later, the remote gave an error again. I manually opened the door, and when I turned the ignition, the central locking engaged, but the date and time were reset again on the screen. The remote works perfectly for the first 3-5 minutes after turning off the car, but everything resets after a while. What should I do? Please help.