I recently saw a conversion of a 1986-1994 E class to make it look like a 1996-2000 E class. I made an equation to desribe what it looked like.
1 car with great engineering, old but still good
+1 body kit of lesser quality, but still a good kit=
One not so appealing car. The fit & finish between after market & factory is definately noticable even to the untrained eye. Like one of our members said earlier, "You get what you pay for"