84-85 are oddball cars compared to later ones.
mid 85 up had 15 wheels vice 14.
87 and up had larger disk brakes and nicer headlights
89 and up had lower body cladding and new style bumpers.
by 91 a leather wheel and shifter were standard.
93 had limited edition version that had lots of extra stuff.

Summary, the newer, the better.

But, I didn't have to tell you that.....

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles