R129 brake calipers fir W124??
R129 brake calipers fir W124??
The rotors being thicker tend to hit the A-arms. I used a grinder and made clearance on mine to fit the 400E brakes in the front. I now have some late w124/R129 spindles and steering knuckles which should make everything fit better.
If you have a '93 300D I think your A arms have the welded ball joints that aren't replaceable, so the larger brakes should just bolt on. You can check the EPC with your car's VIN, it might have the R129 steering knuckles and spindles already. I forget what year they switched to all of that. The calipers will bolt right up no problem, the issue you will have is the rotor hitting something.