It can be the driveshaft support bearing

With 17" rim size and with, almost, the same wheel diameter you can use tire size; 195/55-17, 205/50-17, 205/55-17, 205/60-17, 215/45-17, 215/50-17 and 215/55-17.

Commonly used anti-freeze agents is Ethylene glycol or Propylene glycol. The colour doesnt matter but dont mix the different agents. Anti-freeze agents contain anti-corrosive additives to prevent pure water from corroding in the engine and radiator as well as providing a increased boiling point. I w...

I had the same problem with the instrument cluster in combination with a non-functional head light and fog light.
I turned out to be the light switch that caused these problem.

The 16" rims will fit if ET is 49mm

This is Volvos standard tire/rim setup for S80 T6:

215/55ZR16 7Jx16 ET49
225/55ZR16 7Jx16 ET49
225/50ZR17 7.5Jx17 ET49
235/40ZR18 8Jx18 ET49