AdamsA38P

Hey guys. I own a 2008 Audi A3. I have been having this problem for a year and keep throwing parts at it but nothing is working. I’m sick of dealing with it and am selling the car soon so I want it fixed for the next owner. in any temperature above 76° F if left sitting in the sun the dash will first turn off and I won’t have any vehicle info from the cluster. Then if it’s too too hot, the vehicle will just shut off on its own and I’ll have to wait 5-10 minutes before starting it up again. I’ve installed a crank position sensor, instrument cluster, and gateway module. And had both the cluster and gateway coded to the car. I have no idea what is causing this and I had the issue shortly after purchasing the car. Any insight or if anyone who has dealt with this before and got it fixed can help it’d be greatly appreciated