What I am interested in, is that I think the auto function of the vent/fan may be a source for leaks. I noticed that when closed, pulling down on the vent control knob disengages the electric motor that powers the auto fan/vent control. Then rotating the knob further manually pulls the vent down tighter and snugs it in the closed position. I am thinking that leaving the control switch in the auto position may be the problem I am having. Perhaps high winds in a rainstorm will creep under the vent lid if not tightened down in this manner. Anyone have a similar experience (with an automatic vent/fan).
1998 HR Navigator