S90 MOST bus fault

I had a similar issue with my S90. No audio, nav system kaput. MOST bus fault sounds familiar. Have you checked the fuses?

Yeah, checked the fuses. All seem fine. What was the eventual fix for yours? Was it a specific module that failed?

Turns out one of the control units on the MOST bus was faulty. I didn't have the gear to properly diagnose it, so I ended up taking it to a workshop. They found the culprit pretty quickly.

Thanks for the info! I feared it might be something like that. Looks like a trip to the workshop is in order. Diagnostics confirm it is a faulty control unit on the MOST bus. Quoted 1000€ for the repair.