put a seat cover because, they wont be able to see your seat as you will be sitting in the car whole time lol
fix whatever you can but you still going to get failed in the first go. they will find something wrong
Dont stress to much
Also why you looking for a stock suspension, they dont mind having coilovers in the car. (Mine passed with it)
whatever you going to get failed for just fix them as they will only look at what was written down as failed and need to be fixed in your 2nd visit.