To shed a little more light on this, the "thump" is clearly audible in the vicinty of the right rear wheel, and you can feel it in the hydraulic lines at the hydr. reservoir. "Thump" is probably a misnomer; it's more of a heavy "tick" or "click". The suspension itself seems OK as far as ride goes.

The 4-Matic light is on. I'm very familiar with older Benzes but not too much on the W124 or 4 Matic. The last experience I had with these was in the early '90s when defective speed sensors were usually the problem.

How does one bleed the 4 Matic system?

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1968 230S Automatic, Elfenbein
1975 O309D Executive Westfalia Camper Bus, Blau/ Weiss
1972 280SEL 4,5 Dunkelrot
1966 VW Type 34 "Grosser" Karmann-Ghia
1963 VW 1500 Variant Pearlweiss
1969 VW Variant Automatic, Perugruen
1971 VW Squareback Automatic, Clementine Orange
2001 E320 4Matic Wagon- Our belated welcome to the 21st century! Polar White
1973 280SEL 4,5 Sliding Roof "The Bomb", Dunkelblau.

Hey...you know what you can do with your misnomer.

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2004 E320 Wagon W211
2000 CLK430 Convertible W208
1985 300SD W126
1983 300D W123

ANY tips on how to bleed the 4Matic?

__________________
1968 230S Automatic, Elfenbein
1975 O309D Executive Westfalia Camper Bus, Blau/ Weiss
1972 280SEL 4,5 Dunkelrot
1966 VW Type 34 "Grosser" Karmann-Ghia
1963 VW 1500 Variant Pearlweiss
1969 VW Variant Automatic, Perugruen
1971 VW Squareback Automatic, Clementine Orange
2001 E320 4Matic Wagon- Our belated welcome to the 21st century! Polar White
1973 280SEL 4,5 Sliding Roof "The Bomb", Dunkelblau.