You are more than welcome to leave your car (and the keys) under the lovely shade of the trees on my property in Byron Bay
I will help to keep your treasured M cool by opening all the windows as I cruise about the Shire looking oh so good
Your car will be returned to you on the first day of winter, cool, detailed and fit as a fiddle. I will personally record the reunion between M and owner and post it on YouTube. It will be a touching moment.
However, I have no clue about sunshades.