I just hope their diagnosis is correct and that the job will be covered under warranty.This is a massive job and does require removal of the dash.No need to replace the dryer if all the pipework is sealed up while the system is open.The dryer is probaly not a stand alone part,and in common with most modern cars,it is part of the condenser.

facia removal is a huge job as Lekie says. A significant portion of people who've had this done report all sort of squeaks and rattles afterward. They rarely go back in as well as they were built.

I would suggest you take the service manager out for a ride before it's done and agree that it's solid and quiet, so you have some comeback after if it's noisey.

Anti-squeak tape can work wonders!