I put 400E brakes on my 190E 2.6 at all four corners. Coupled with Motul 600 brake fluid, SS brakelines and Axxis metal master brake pads, the 190 brakes so well it almost makes you sick!
I can not imagine needing anything more on a 190E, as my car now outbrakes my Corvette, my old M3 and my old C36! All this for roughly $960 dollars!
Visit my web page for more details of the installation.