Hey, Guy... apparently the recent burst of tourism in the Frisch Castle area has resulted in a lot of vehicle problems, because I found three abandoned ones on the Governor's land near there today:
Red car in the entrance to the Biergarten at Mann 175,252,24 (Now that I think of it, I'm not sure if that one was on Linden land or not, but I'll mention it anyway.)
Motorcycle in the water at Mann 186,207,21.
Sinking boat at Mann 181,61,24.
Thanks!