92 300 E 3.0L rotot size question
 

So I ordered some Brembo front rotors online.

They show up, not correct mounting pattern, disc set screw too big. Very strange as the part nos. etc. on box were correct. I was in a pinch so I called the dealer for back up. He asked a vin nos but presto the rotors fit.

I thought maybe backs got sent by mistake, so I pop the back wheel off, the bolt pattern matches, but disc set screw still to big, and center diameter hole is too big on the Brembos, close to 3", where the back rotors center was 2.5"-2.75".

Any ideas or insights here or am I just too stupid to own a MBZ!

thanx in advance,
Joe