"DX" and "Xara" do not exist as Citroën models

First DX is a 1993 Xantia: http://img64.imageshack.us/my.php?image=flodderdvd6ep36046td3.jpg
Second DX is a BX: http://img267.imageshack.us/my.php?image=citroendxam2.jpg
First Xara is a ZX: http://img58.imageshack.us/my.php?image=citroenxara2to0.jpg
Actually the same as the unknown: http://img255.imageshack.us/my.php?image=flodderdvd6ep34134yo6.jpg
Second Xara is a 1994(or later) XM: http://img267.imageshack.us/my.php?image=citroenxaravf7.jpg