I can just barely reach the vent handle in the living room on our 5er and my wife has no chance, even on the step stool. A friend's son developed this extension handle for just this problem.
www.jbkwikstik.com I haven't ordered one yet, but looks like it will solve the problem.
I've seen other home-made ones, and read discussion on ones that others have built, but lately it seems like all my "round to-its" have expired and I'm left with a whole bunch of unfinished projects, so I'm going to order one.
Will post back once I get it.
Greg
'07 Ram 2500 CTD 4x4 Quad Cab
'10 Keystone Laredo 245 5er