Oi..what do you mean shame. My 1993 aero gives me a warm fuzzy fealing when ever I egt into her....Ok, it maybe the warm feeling of urine when I don't know if I'm going to make a corner, but all the same, not something you can attribute specifically to 1993's .
One thing though, mine has one air bag that could have been two....but where did four come from? Was four an option?
I know the guy selling this Saab and he is an experienced Saab trader (working from home these days) so he shouldn't make any mistakes with his descriptions. I have always believed him to be a decent honest guy.
THe only difficulty with MY93 Trionic upgrades is the need to source a working replacement ECU for exchange if you don't want to be without a car whilst it is reprogrammed- see this thread for more info.