They're not steelies, but rather plain alloy wheels. There are many plain designs on Mercedes that you won't get in NA, simply because of the cult of Bling. Also, BMW and Mercedes do "run of the mill" versions of all their cars, rather than all models sold being something to park on your drive just to show off to the neigbours. It's actually pretty cool, as you get a kick ass car/engineering, but don't have to be a Cxx level employee to own one.
Anyway, all E class Mercedes are Taxis.