Hi,
When I got the wrong rotors for my '95 E320 sedan the hole for the small hexhead screw that holds the rotor to the hub before the wheel is on was shifted and would not line up. The rotor also rubbed on the caliper some. I had to get the correct part number too!

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1984 300CD (sold)
1973 220DPK 4 spd (died)
1978 350SL 4 spd gray market
2003 SLK32 AMG
1988 300CE (sold)
1997 E420 (Totaled)
1998 E320 Wagon