Vehicle stopped on interstate. Check engine light on Wont start unless cold HELP

Thank you. Everything that can go wrong, has done so in the past. Locks keep popping up and down, BAS lights stay on, check engine light stays on. Every 6 months, I'm installing brakes, seated heats don't work, the passenger window goes down on it's own. Maybe the original owner died and want's the vehicle back. He/She can HAVE it!!!!

very common for mbz after the 1st 3 yrs,they are money pits