Hi, I have an ECHO sedan as well and my back seats fold down, I was able to fit a whole glass computer desk in my car-of course barely...my friend gave it to me before he moved...we where able to take some of it appart but he couldn't figure out the rest and I don't think he could find the right tools, anyway the parts we did get off I put in the trunk and the table itself was in the back seat going up to the front passenger side sideways, although I did have to bring my seat up close, too close to the steering wheel and it looked funny but yes I know its dangerous that's why I was praying nothing would happend to me on the way home, most of it was freeway. Another concern I had in this case was the table or desk was glass, majority of it...so I was afraid if I did sudden manuvers it would crack or break sense there was pressure on it from being in a tight spot which can be good in this circumstance cause you don't want something fragile flying all over the place. I didn't use the fold down seats in the back cause I really had no need for them...it wouldn't really make a difference also I have a subwoofer in the back, I can still put them down its just that's mostly in the way. I was surprised I could fit it in there, the ECHO has the high roof so that helped, if it was any other car (Besides Yaris

) then I don't think it would have worked...also I have a two door so that was even worst! Do you have a four door or two...can't you "easily" disasemble the Ikea furnature? If not like others have said, give it a try and if you have a four door it would be easier as far as getting it in and out...otherwise look for someone who has a van? Good luck! Let us know how it turns out! Sorry for the novel!!