I have an older Teala with AP, and I dont understand how this is possible...
You can't engage it on your driveway. It'll say its unavailable. You gotta be moving a bit first on a roadway.
If he was on the roadway and turning into his driveway, AP cant make turns, so thats not possible.
He could have had traffic aware cruise control on, and auto steer off so he could steer it, but then he's the one who drove it into the garage.
Edit: maybe a cul du sac where he's at the end and itd drive straight up, but he wouldn't have been able to turn onto it, which means he would have had to turn it on just for the small street?
Edit: and if they story is it went off the road into the garage on its own with a sudden turn... check that angle out. Its not like it came in on a shallow angle veering off the road, its almost 90 degrees to the garage from a short driveway...