Hi Folks, I'm a little embarassed by my lack of MB knowledge - so here goes:
In the 300 series diesels what distinguishes the models with the round headlights versus the models with the square headlights?
I always thought it was a year of manufacture issue ( early 1980's had round, mid to late 80's had square) - but this does not seem to be correct.

Naively yours,

Aivars