Yea...apa...ra!! my Cbu E90 also without this foldable mirror. Frankly, its quite embarassing to fold it manually, since E90 is the latest flagship model for BMW. Admit that its bit hard to manually fold it, at first scared too. But later..much easier.
In my experience, normally japs spec mostly come with auto folding, sunroof, etc. As my E46ci came with it. But my previous E46 sedan cbu from south africa no folding mirror la....so went to fix aftermarket side mirror where later hide the active button underneath dashboard compartment. Pretty welldone job, i must say.