David:

Like DOC said, you likely have bad rotors(warped perhaps). I went through a similar situation with my 126 car about a year ago.

Competent indy garage changed out all rotors and pads - used OEM parts. From highway speed while braking, I experienced front-end shudder.

Took the car back, The owner ordered another set of front rotors. Same thing, Took it back again, This time he reordered both front and rear rotors. Same thing. Reordered another set(all the way around) AGAIN! Finally got it this time.

Apparently his supplier(Caliber MB - Anaheim, Calif) had a bad batch of rotors - some sort of production issue I suppose. It happens.

My 2 cents.

__________________
Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"