2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # S-32_25-83 Date: 110908

2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # S-32_25-83 Date: 110908

Suspension - Assembly Of Suspension Struts And Shocks

Date: September 8, 2011

Order No.: S-B-32.25/83

Group: 32

SUBJECT: MY-All, Models All

2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 103

Assembly of Suspension Struts and Shock Absorbers

The correct procedure for installing and removing or disassembling/assembling shock absorbers and struts is described below.

1. Damper tube

2. Piston rod

a. Friction marks on sealing piston

b. Without friction marks on sealing piston

Procedure

1. When releasing or tightening the nut on the piston rod (Figure 1) (2) a impact wrench/driver must not be used because the piston rod (Figure 1) (2)

will also turn and by doing so it may cause friction marks (arrow) in the damper tube (Figure 1) (1) and on the sealing piston (Figure 1) (a).

2. When releasing and tightening, the piston rod must be counter held at the upper end using a suitable tool. See WIS document:

Disassembling/assembling suspension struts AR32.25-P-1018*.

3. Turning with the impact wrench/driver creates chips, which are deposited in the sealing piston and damage the piston rod sealing. In this instance,

the damper sealing capability is no longer sustained.