Wow that was cruel, funny yes, but still cruel.
To answer your question the bike fits into the back due to stellar German engineering. This creates the perfect environment for my bike equipped with a groupo made by Italian artisans
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All kidding aside my bike fits perfectly in the back with the front wheel taken off. The back seat is folded down of course. Then again the back seat is useless anyway. It is a snug fit. I am 5'10" tall. If I was 6'0" tall I would probably have to lower the seat each time. I pretty much leave my bike in their 100% of the time during warm weather. It makes riding always convenient and lets me start where I want.
Regarding the size of the car I like it a lot. It is more like a classic 3-series size. It also does not have all of the gadgetry of the more expensive BMW's. It is austere and very functional. It has a 6 speed manual transmission and 240hp. It does not weigh near as much as the bigger BMW's and is very fun to drive. It is my favorite car I have ever owned.