Had the rotors replaced about 10,000 miles ago. At the same time, put on new AXIS brake pads (lower dust and I believe better feel). After about 9000 miles, felt a grabing and releasing on low speed gradual braking. Shop decided it was the rotors. Resurfaced rotors. Still there. Finally, after replacement of steering shock also found a bad ABS sensor. Now, under hard braking around 65 miles, steering shimmy is violent all the way to release of brakes. Under heavy or light braking at any other speed no shimmy or vibration. Tires also have been balanced. Any help?
86 300sdl, 177k
91 300TE 4matic, 120k