Ccrosser Overheating and Coolant Leak

I had something similar with my Ccrosser. Have you checked the cable and plug connections to the components? A defective connection can cause all sorts of weirdness.

Interesting. Which components specifically? I don't want to start yanking on every wire I see.

Unfortunately, I am unable to give you any details, but from my experience, I would recommend you visit a trusted repair shop. They can perform a diagnostic trouble code (DTC) read and pinpoint the fault.

You were spot on. Took it to the shop, and it turned out to be a bad connection, just like you said. 95€ later, and it's fixed! Thanks a bunch!