Some ask to have a flap or window made on the driver's side window area to view the VDS when charging. I have a 1.5 and found I can perfectly view the VDS from the charge port flap of the cover. Don't know if that would work with the 2.5 since its in the center rather than the driver side.
I don't have a garage so I switch between using the cover and the shower cap to keep things protected / cool.