Koleos electrical faults

Sounds like a BUS communication issue. Intermittent faults, especially across multiple systems, are often network related. Has the vehicle experienced any recent impacts, or has the battery been disconnected/replaced? Check all your grounds, especially those related to the affected control units. Faults like these can be tricky, requiring a CAN bus diagnostic tool for thorough testing.

Grounds and CAN bus? Sounds serious. So, you think it's more than just a loose wire? What exactly should I be looking for with the grounds?

Potentially, yes, it's broader than a simple loose wire. Grounds should be clean and tight, no corrosion. CAN bus issues can manifest in strange ways, mimicking individual component failures. However, given the sporadic nature and range of errors, I'd suggest getting it professionally diagnosed before diving too deep. A workshop can pinpoint the exact cause and provide a reliable fix.

Thanks for the advice! A faulty cable connection to the control unit (BUS system) was the problem. Workshop charged 155€ to fix it. Appreciate the help!