Who has successfully replaced this mount? I got the front one in OK but I'll be damned if I can figure out how you get the other one swapped out. The FCP video of the S60 replacement makes it look fairly straightforward but there is so little room around the turbo plumbing that I can't see how it co...

I would check air delivery pipes, especially between AMM and throttle body.

Your instrument cluster is failing. They all do at some point. Eventually it will stop working entirely. I had mine repaired in the US by europeanelectric.net. Looks like one European source is volvotech.eu in Amsterdam.

Looks like you need a new strut mount. Replace both sides with part number 30714968 and consider new spring seats, as well. You will need to drop the strut assemblies, remove the springs, etc. and get the steering aligned when complete.

Control arm bushings

No error codes? Possibly coolant temp sensor?

Bad coolant temp sensor?