2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # LI46-20_P-0517672 Date: 111129

2020 Mercedes Benz Truck ML 350 Technical Service Bulletin # LI46-20_P-0517672 Date: 111129

2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 57

Steering - Leak In Input Shaft Area Of Steering Gear

Steering leaking in area of input shaft, below protective cap

Topic number LI46.20-P-051767

Version 2

Design group 46.20 Steering gear

Date 11-29-2011

Validity Model 164 except CODE (213) Speed-sensitive power steering

Model 251 except CODE (213) Speed-sensitive power steering

Reason for change Exception for toe checking / adjusting

Complaint:

Steering leaking in area of input shaft, below protective cap.

This complaint only affects steering gears with the following part numbers:

A164 460 01 00

A164 460 05 00

A251 460 02 00

A251 460 07 00

The repair method described below may only be used on these part numbers.

Cause:

Wear on upper radial shaft sealing ring in control head

Remedy:

NOTE:

It is not necessary to replace the entire steering gear!!!

Replace control head complete, replacing the lower radial shaft sealing ring in the steering gear housing at the same time.

Procedure:

1. Remove steering, as per AR46.20-P-0600GZ

2. Detach control head and replace lower radial shaft sealing ring in steering gear housing, as per AR46.20-P-0003Q, valid for models 203/209

Note:

The work instructions AR46.20-P-0003Q "Replace lower radial shaft sealing ring at control head" is currently being expanded for models

164/251 and will be published in WIS shortly. Follow all the operation steps as for models 203/209, and use the torque specifications of

these models. This also applies for the operation number with text (46-4216).

3. Install new control head according to parts listing, as per AR46.20-P-0003Q, valid for models 203/209

4. Adjust play between thrust piece and steering rack, as per AR46.20-P-0601TX

5. Install steering, as per AR46.20-P-0600GZ

6. Check function of steering

Note:

For this repair the front toe need to be checked / adjusted when necessary.

2020 Mercedes Benz Truck ML 350 4MATIC (164.186) V6-3.5L (272.967) Page 58