Old thread, but I have a new sunshade. Actually I've had it since December just after I got the car, but will need to install it more frequently now that it's warming up.
The problem is that there's no clearance between the glass and plastic around the window, so it can't fit. There's enough gap in the corners only. If I just leave it in the corners it sags down considerably. Is there some sort of trick I'm missing? Shoulda just got a tint?