Mercedes Benz

Suspension - Under Vehicle Knocking/Thumping Noises Date: March 14, 2006 Order No.: T-B-32.20/30a Supersedes: T-B-32.20/30 dated June 7, 2005 Group: 32 Revision History SUBJECT: Model 163.154/157/172/174/175, up to VIN A572198 Noises from Vehicle Underbody If you receive customer reports in the above model vehicles of a knocking noise while driving, thumping noise from underneath the front seat area, or noises while turning, perform the following repair procedure. 1) Place vehicle on a lift and raise. Reference WIS document AS00.00-Z-0010-01A. 2) Measure spring preload of torsion bar using caliper gauge at access hole. Reference WIS document AR32.20-P-0200GH. 2000 Mercedes Benz Truck ML 55 AMG (163.174) V8-5.5L (113.981) 298 3) Remove bolt (Figure 1, 1) and release tension from torsion bar (Figure 1, 2). Reference WIS document AR32.20-P-0200GH. 4) Remove bottom half of adjuster assembly (Figure 1, 3). 5) Remove and discard damaged plastic support (Figure 1, 4). 6)...