Tuesday, June 16, 2020

Technical Service Bulletin # Mercedes Benz Truck GL 550 LI91-10_P-054832 Date: 121127

Technical Service Bulletin # Mercedes Benz Truck GL 550 LI91-10_P-054832 Date: 121127

Interior - Electric Seat Noises

Noises from electric seat fore/aft adjustment or fore/aft adjustment nonfunctional

Topic number LI91.10-P-054832

Version 1

Design group 91.10 Front seats

Date 11-27-2012

Validity Model series 164 and 251 with fully electric seat adjustment

Reason for change

Complaint:

1. Noises when operating electric seat fore/aft adjustment

2. Electric fore/aft adjustment nonfunctional

Cause:

1. Frictional vibrations along fore/aft adjustment shaft

2. Motor detached owing to mechanical damage to electric motor retaining plate

Remedy:

Replacement of adjustment motor, shafts and electric motor retaining plate of relevant seat.

Instructions for replacement of electric motor with electric motor retaining plate:

1. Move seat to forwardmost position

2. Remove seat cushion as per work instructions

3. Detach plastic rails used to mount control unit (Pic1)

2011 Mercedes Benz Truck GL 550 (164.886) V8-5.5L (273.963) Page 126

4. Disconnect electric motor plug contact

5. Remove bolts T40 securing electric motor retaining plate (Pic2)

6. Push out electric motor upward (Pic3)

7. Remove electric motor

8. Pull shafts out of rails using pliers

Important:

To ensure that the two rails remain parallel, do not twist the shafts and do not move the rails mechanically

9. Remove electric motor retaining plate

10. Position new electric motor retaining plate and screw in new bolts by a few threads

11. Insert shafts all the way into rails.

Important:

Do not turn the shafts by hand.

12. Attach rubber mounts to new electric motor

2011 Mercedes Benz Truck GL 550 (164.886) V8-5.5L (273.963) Page 127

13. Attach electric motor to short shaft first (Pic4)

Note:

The electrical connection must always point upward.

14. Attach rubber cap to long shaft and insert long shaft at electric motor

2011 Mercedes Benz Truck GL 550 (164.886) V8-5.5L (273.963) Page 128

15. Secure shaft and electric motor on retaining plate (Pic5-7)

16. Tighten bolts securing electric motor retaining plate to 25Nm

17. Assemble remaining components in reverse order

Attachments

2011 Mercedes Benz Truck GL 550 (164.886) V8-5.5L (273.963) Page 129