I've searched through the archives and thought that I have found enough info to flush the brake fluid myself on my ML430. I will be buying a Motive pressure bleeder. Looks like the sequence is RR, LR, RF, LF. But, I read one thread where an ASR equipped vehicle has to have yet another valve opened, I'm a little confused on what this last one is and where it falls in the sequence. Can someone explain if I have to bleed anywhere else besides at the calipers? Thanks. -Norm