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within 10 minutes of sealant application.Technical Service Bulletin # Mercedes Benz Truck GL 550 S-32_25-82B Date: 111221

within 10 minutes of sealant application.Technical Service Bulletin # Mercedes Benz Truck GL 550 S-32_25-82B Date: 111221

Suspension - Strut/Shock Absorber Replacement Guidelines

Date December 21, 2011

Order No. S-B-32.25/82b

Supersedes S-B-32.25/82a dated Dec. 22 2010

Group. 32

Revision History

2011 Mercedes Benz Truck GL 550 (164.886) V8-5.5L (273.963) Page 90

Revision Date Purpose

b 12/21/11 All new text and added models.

a 12/22/10 Minor changes to last paragraph.

SUBJECT: MY-All, Models 124, 129, 140, 163, 164, 166, 169, 170, 171, 172, 201, 202, 203, 204, 207, 208, 209, 210, 211, 212, 215, 216, 218,

219, 220, 221, 230, 240, 245, 251, 463

Shock Absorber Replacement

General Information on Shock Absorber Variants

Do not replace both shock absorbers AIRmatic, ABC, ADS or adjustable suspension strut if only one is defective. Only a component that has been

diagnosed to be faulty (damper or suspension strut) may be replaced!

Noise Inspection

Reason for the noise should be determined by driving each side of the vehicle in turn over appropriate road surfacing or if possible by swapping over

the left and right component (damper or suspension strut). Before any replacement is made loosen and re4orque the corresponding

damper/suspension strut first and check whether this resolves the noise complaint.

Front

On the front suspension struts or dampers this need only be carried out on the top bearing mounting.

Rear

Both the upper and the lower attachments for the rear suspension struts or dampers must be loosened and then tightened again to the specified torque

with the vehicle in its ready-to-drive condition (i.e. the vehicle must be standing on its wheels).

Section 2: Special considerations for different damping variants

1) Air suspension struts and dampers (Model 164, 166, 211, 212, 219, 220, 221 240, 251)

ADS suspension strut (Model 129, 210, 140)

Adjusting damper (Model 204, 207, 231)

Since it can be assumed that a new shock absorber installed in a high-mileage vehicle would not harmonize with the used shock absorber and thus

impair ride comfort or vehicle dynamics, we recommend replacing these parts in pairs after the component has traveled at least 80,000 km.

2) ABC suspension struts (Model 215, 216, 220, 221, 230) In contrast to the air Or ADS suspension struts or conventional dampers, ABC

suspension struts must not be replaced in pairs at higher mileages (more than 80,000 km). The vehicle body dampening is performed by active

actuation of the plungers. These work wear-free! Passive wheel damping by the shock absorber integrated in the suspension strut plays a subordinate

role.

3a) Conventional dampers (Model 164, 166, 168, 169, 171, 203, 204, 207, 209, 211, 212, 218, 219, 230, 245, 246, 251) Since it can be assumed

that a new shock absorber installed in a high-mileage vehicle would not harmonize with the used shock absorber and thus impair ride comfort or

vehicle dynamics, we recommend replacing these parts in pairs after the component has traveled at least 80,000 km.

3b) Conventional dampers (Model 124, 129, 140, 163, 170, 201, 202, 208, 210, 461, 463) On these models diverse shock absorber variants are

standardized in the parts sector.

If dampers with new standardized part numbers are installed for replacement, then conventional dampers must be replaced in pairs!

In the event of any complaints on parts that have already been replaced in pairs, then the procedure as described in 3a should be followed.

Section 3: Deviating procedure

Information on additional deviating specifications for technical modifications is available in EPC and TIPS The current documentation in advanced

systems such as TIPS and EPC must always be followed! At this moment in time, we would like to draw your attention to the special considerations

for models 204, 207 and 212.