Skoda Yeti electrical issues

Sounds familiar. I had something similar with my Yeti, though I can't remember the exact error code. System failure and warning signals galore! Did you try scanning for OBD-II codes? That might give you a clue. In my case, it was a faulty connection to one of the control units.

OBD-II codes? Is that something I can check myself, or do I need to take it somewhere?

OBD-II is the standard diagnostic port in your car. You can get a scan tool – they're not too expensive – and plug it in to read the error codes yourself. That'll give you a better idea of what's going wrong. But honestly, given the symptoms, it does sound like a wiring issue. If you're not comfortable poking around with the electrics, I'd suggest a workshop. I ended up needing one.

Thanks for the suggestion. I took it to the shop. Turns out you were spot on – a dodgy connection to the BUS system. They sorted it for 155€.