[SARAFIL]

The clean way is you do your deal w/ BMW dealer and trade the Porsche, settle up the $$ and go on your way. Then BMW dealer can keep the Porsche or sell it to Porsche dealer, ultimately their choice. However they probably don’t want to do this because the deal you have made with Porsche is more than BMW thinks the car is worth so they want to make sure Porsche is good for the money.

What’s the $10k - is that equity in the Porsche after a loan balance, meaning there is a delay to pay off loan and get title? Or just net cash owed to you between BMW and Porsche value?

Regarding risk of an accident, if you “trade in” the Porsche when you pick up the BMW, it’s officially their car at that point - you have no more interest in it - so it’s different from the stuka example where your car is in for service.