Okay, I'm going to leave aside the fact that he's got two Teslas, which I hate with a passion.
He literally said he's about even on the Kampfwagen.
The model Y is, for all intents and purposes, all the car anyone really needs (if he NEEDED a truck, he'd have a real truck). He's upside down on it, sure, but there's nothing to do about that unless he can pay off extra. However, he can keep making the payments and just driving it. It should still have several years of battery and drivetrain warranty unless Tesla's is shorter than the industry standard 8 years.
Sell the fucking Panzer and drive the Y until you've managed to pay off your stupid debt, numbnuts. I WISH my debt problem was that easy. My ex put me deeeeeep into 5 digits of debt with constant manipulation (it started off with her getting pregnant "on the pill" so she could start threatening me with never seeing the baby if I don't do the things she wants me to do) and I have NO assets to show for it. Nothing to sell. My car cost me under 2k. Now totals to around 3k with the registration, insurance, maintenance and repairs I've done. My only solace is that even after I get everything paid off, nobody's giving me a loan for another 5 years till the debt registry entries are cleared. I literally can't get into more debt anymore, other than the interest on old shit, which luckily is capped too.