Sorry, Pat, but you are wrong. The caliper bolts up fine to a W124, yes, but the 294x25mm rotor sits too close to the ball joint. Stock, there is 6-7mm clearance (air gap) betwen these (and the dust shield is in the middle taking up about 1mm of that). The 294x25 rotor sits 6mm deeper and takes away all that clearance. Trust me. BT, DT, have the photos to prove it. They don't work. I had bought a full setup from a 1994 E420 and had to sell them to someone with a W201.

Perhaps the early 4-pot 295x22 rotors fit - I have not measured those. But that seemed like less of an upgrade from 284x22, IMO. If you study the EPC, or my brake upgrade spreadsheet, you'll note that EVERY factory fitment of 294x25 rotors has either the different LCA, or a different knuckle/hub.

The W201 has a different knuckle/hub etc and the E420 stuff fits fine except (maybe) on the 16v model (not sure on that - may fit OK.)