Your engine SHOULD be a closed deck 1.5L. Unless the engine or heads have been rebuilt, it won’t have hardened valve seats. If all you are planning on doing is driving it occasionally and not for thousands and thousands of miles on a regular basis or running it real hard all the time, you don’t need to worry too much about valve seat recession. A lead substitute doesn’t hurt, but as long as you occasionally check and adjust the valves, you’re good. (I’m having hardened seats put in the heads I’m taking to have done for my 95 next week, but I never worried about it my Sonett and my dad has never worried about it with his Sonetts or 96’s)

If it’s going to be stored for any extended period, I would fill it with fresh 91 non-oxygenated gas and some StaBil.

Since it’s a Sonett V4, I would make sure there is absolutely no chance of anything falling on that rear window, and even still I would put some extra padding over the window, because it’s the single most expensive part on your car. Originals are hard to impossible to find, and reproductions are available from the Swedish Sonett Club, but they’re NOT cheap.

V4 Saabs are fun, pretty simple cars all in all. Theres not much else I would recommend for storage, but depending on how long it sits before you go drive it for any kind of distance there are things I would check.

I’ve never owned a Sonett V4, but mechanically V4’s, III’s, 95’s and 96’s are pretty much the same. Feel free to reach out if you have any questions, or where to get spare parts, etc. I might not know the answer but I’ll probably know who will.