You will definitely notice the ABS on a 300E. I certainly did in Ft. Wayne last saturday AM while leaving, when I slid on some icey snow. Or didn't, actually, but the ABS action is both noisy and obvious at the pedal.
Probably very effective, and the pulsation is telling you to let up on the brakes.
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!