My daughter just showed me as she was leaving our home that the round
dial on her driver's side air vent (a/c vent) was partially missing.
This is the dial that opens or closes the vent. Perhaps it got
brittle and somewhat broke off???? If I wanted to replace it, is
this a difficult job? I mean do I have to take a lot of things off
or apart to get to that dial? The dial is round and it's edge is what
you slide up or down to open or close that vent.