(apparently because of the Archived's ZIL's camo painting I didn't notice certain features there)
But in that case we have another problem: lack of Caddaric79 in the credits.
I'd still suggest making the mirror strut if not black, then at least much darker, as in that color it's just fading into background (meaning the cabin). That said, I'm bit puzzled why on both versions (Your's and Caddaric's) the door window is not
outlined in black, but the metal shape just below the window is
EDIT: as for the hinges - maybe not exactly drawing them all black, just making at some (proper) place the line where the cabin "ends" and door "begins".