Hello,

This is my first post, so thanks for having me . I am working on a 87 300D that I am upgrading to 500E brakes. I have copied gsxr spreadsheet and refer to it religously! Thanks for putting that together! I'm not really looking for suggestions on what I should do, but I have a general concern about the brake bias, since it is so important not to lock the rears first. I am struggling to understand Mercedes logic on the 94-98 SL500 w/ 472/ESP and later Euro 500E vs the bias on the US 500E.

The 500E went from 300x28F-278x24R to 320x30F-278x24R (except Euro) correct? Now I don't see a big difference in bias, because the rears are the same and the front pads and piston diameters are the same for 300 and 320 calipers. Only the torque radius changes by about 10mm in the front, which I assume is only a small difference in brake force, but much better brake fade.

The 94-98 SL500 w/ 472/ESP and the later Euro 500E had 320x30F-300x22R correct? I see these rear calipers as a big jump from the 278x24 rears on the US 500E with much larger pads, larger pistons and the 11mm torque radius increase.

I realize that there were two piston diameters available for the rear 300x22, but either of the rear 300 calipers are larger in piston area than the 278 caliper.

So am I correct in thinking that Mercedes was able to make the 500E brake successfully with two different brake bias combos if you compare the later US vs Euro models?