2019 CADILLAC XT5 Electrical System Problems

The passenger interior side door at the bottom towards the back near the backseat, beginning driver seat caught fire. A small tiny hole began melting, and there was flames coming out of it. Within minutes. My entire car was engulfed in flames when the fire department came they said it seemed like it was fuses that began the Fire. I bought this car used from Carmax literally only two weeks ago and had only driven it. maybe 100 miles it’s a 2020. I don’t understand how this happened and I’m concerned about other Cadillacs of this model having the same issue.

Service stability track light came on. Brought to Mechanic hooked up to computer. No code shown. Mechanic says car is fine. Keep it off for 15 minutes and the computer will reset. Driving on the highway Emergency brake came on by itself and stopped the vehicle all caution lights lit up on on the dashboard. Service engine light came on brought it back to the mechanic again no codes shown drove it for three days has been running fine and on the fourth day vehicle will not start.