We have some aftermarket ones (2016 E450) The pass side turns roughly 160deg. Not bad, I like sitting there. The driver's side turns about 90 degrees. I like sitting there too, with a laptop.
For me, maybe lower less than an inch. It did not cause any problems with the house floor height and clearance. In my case, I added washers to the front to give more support to thighs (pass), and washers to both front and back, so raise me up as high as could fit without changing bolts, since my seats are not adjustable.