I have a 2015 S80 T6 with a cracked air intake hose that needs to be replaced. It first appeared to be a simple project but realized that is very close to the firewall and I don't see how to access it at that location. Would anyone have any step-by-step directions on how to r/r the intake hose? Than...

When I accelerate I hear a high pitched noise and read that it could be eliminated by removing (lifting) the oil dipstick. I did this and seemed to have worked but what it causing it as you should not have to do this??