Slide Seal Not Properly Attached. Fix Myself? Or Warranty

I know myself...I'd fix it myself because it's an easy one.
But, I'd probably call the dealer and tell them about the problem and see what they suggest.

If they approve it, I'd repair it...but if you take it in, it's a half hour job. You could just wait and take it home again. There should be no need to leave it...as long as you have an appointment.