I bought a half car cover because it covers all the windows and protects all the leather, not just the dash. Also it is very compact so it doesn't take up much room in the trunk. I bought my about 5 years ago and that company is no longer in business. This link shows a similar product. I did not buy from them and showing it only as an example. https://www.amazon.com/Tofern-Waterproof-Cover-Winter-Summer/dp/B016G6RJ6O
I purchased a Cover Craft custom sun shade in 2015 that fits the 612 perfectly and I've been very happy with it. It has sections that fold up for storage - still. It is the UVS100 that is custom made - you put your year/make/model in. Link to the Covercraft site below. Covercraft Silver UVS100 Custom Sunscreen UV10980SV https://www.covercraft.com/us/en/product/uvs100-premier-series-custom-sunscreen.UVP
I just remembered, Robb posted a pic of my car with the cover on. https://www.ferrarichat.com/forum/threads/route-suggestions-albuquerque-to-scottsdale.611258/page-6
I use a small pop up sun shade from Pep Boys. Around $10. Folds into two 12" or so circles. Covers about 90% or more and takes up very little room.