@Kavman
First, welcome to the Cruzbike tribe. There is a wealth of info on the site but no one minds if you can't find something and ask a question that has been asked before. Usually, something new comes out from a different perspective that adds to the overall knowledge and we are all better off.
I have a QX100 with reversed handlebars so they take up as much space as Q45 probably. (Not the bike in the avatar.) I have a Honda Odyssey 1998 (or other names for Honda's first "minivan" on an Accord platform with regular doors before they added sliding doors. Anyway, with the rear seat folded and one of the middle seats folded I can put it in whole - nothing removed - by reversing the handlebars and wiggling it in. If you care about your vehicle's plastic, upholstery, etc. then put a blanket over the pedals and chain ring before even putting it in.
With the rear wheel removed (by far the easier one to remove and therefore first) it can be fit behind the middle seat (like a hatchback with the seat down). I just get the front in and set the rear of the fframe down on the "floor" carpet. Then I make sure nothing is going to move around. Often I use the seatbelt to hold the bike from tipping over in transit.
If I have to fit it smaller the next step is to undo the quick release for the suspenion and flip the "tail" under and forward until it holds the front wheel in place.
Next, if necessary would be to remove the seat: loosssen the seat pan thumbscrewz on the QX100 (better mech on Q45?) and losssssssssten the seat post quick release. Then wiggle the seat post in if necessary to release the seat pan, then slide the whole package back and out. Leave the hole thing together if you can (don't lose the thumbsscrews or any mechanism.!.
You can remove the front wheel relatively easily too
You can rotate the handle bar or remove the handlebar but I have not had to do that. (I don't have quick releases for my handlebars so that require tools..)
Sorry ab0out my keyboard sticking!! Hopefully this help with your Q45. Do the least amount of disasembly that you can and re-assembly will go quicker. The rear wheel removal and tail flip takes about 3 minutes the first time and about 30 seconds thereafter, removing the seat is about the same amount of time again. It will take you more time to wiggle the bike carefully into your space without damaging stuffffffffff if you are caring about the bike and the car at the same time and are under weight (leverage) and under powered like me. That time is almost all care.
Front wheel is about the same,
Reassembly can be more of a challenge. Many people have bike stands that hold the front wheel in pictures on this site. They would make things much easier. If not, find yourself a soft surface (ie. grass) and place frame gently on its side to reconstruct. Then tighten everything with it vertical and aligned.
Do like the previous owner of mine did:
put a piece of electrical tape around the boom where it "hits" the seat. You won't be able to see it from more than 10 feet away and you will thank yourself later when it swings around some day when you are parking it and don't notice in time.