Shot by someone else.
Placed in the car.
Someone else detonated it.
That’s my story and I’m sticking to it.
Sun March 4, 2018
Police identify man who shot himself outside White House
Washington, DC, police have identified a man who shot himself in the head in front of the White House at just before noon Saturday as 26-year-old Cameron Ross Burgess of Maylene, Alabama.
Q832
Tesla Truck Explosion Outside Trump Hotel : What to Know ...1 day agoLAS VEGAS — The highly decorated Army soldier inside a Tesla Cybertruck packed with fireworks that exploded outside Trump International Hotel in Las Vegas shot himself in the head just before ...
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'note: I think both the man and machine were likely remote controlled. He didn't load the truck. Could function as a warning, "Think how many we control..." Possibly trying to tar the military; if Biden wants to try martial law, he won't want to use loyal military. By smearing the mil as working with Isis or unstable/bombing, perhaps justify the use of Obama's army or some black hat resource.
You missed the bit where the self-driving car was remotely maneuvered to the hotel, but otherwise your plan has no holes.
https://duckduckgo.com/?t=ffab&q=cybercar+is+self+driving&ia=web