Here´s the short version on W211-chassis with rear overhang extension:



Coachbuilder for both vehicles was Ellena Autotrasformazioni of Saluzzo/ Italy, but a few other makes could also be responsible for what you have seen. Anyway, it´s quite likely that it was an Italian coachwork, which is fairly possible in Spain. At least no Spanish competitor currently showing a comparable style of bodies comes into my mind.