NHTSA ID Number: 10170546
Manufacturer Communication Number: LI54.30-P-069821
TSB/Document Date: 2020-01-21
Summary
Display on driver's side remains sporadically dark
Display on driver's side remains sporadically dark
Topic number
LI54.30-P-069821
Version
2
Function group
54.30 Instrument cluster, display instruments, hazard
warning device
Date
12-23-2019
Validity
BR177 with code 859 or 458+859
BR247 with code 859 or 458+859
BR118 with code 859 or 458+859
Reason for change
Remedy revised
Reason for block
Complaint:
The display on the driver's side (instrument cluster) may remain dark upon opening the door and the welcome animation is not shown (see attachment). The display may continue to remain dark after the engine is started.
NOTE: This document is only relevant to the above complaint.
Attachments
File
Description
instrument cluster display dark.jpg
Instrument cluster display dark
Cause:
- Software for instrument cluster control unit (N133/1)
- Software for display cluster (A40/16)
- Damage to HSVL lines, shielding, or connectors
- Hardware for display cluster (A40/16)
Remedy:
Ensure software for both the instrument cluster control unit (N133/1) and the display cluster (A40/16) are up-to-date
NOTE: Check whether any relevant DTCs are active or stored in the XENTRY quick test, and process these accordingly using XENTRY diagnosis before proceeding with the below steps.
1. Inspect the HSVL lines (and shielding) between N133 and A40/16. Proceed as follows to check the connections on
the display side (see Annex A):
- Remove the display from the dashboard leaving connections intact.
- With the display active, manipulate the HSVL lines and connectors and observe the the display for any loss of video
signal.
- IF movement reproduces the problem, then check the seating/fit of the connector for both video lines on the display
(A40/16).
- IF the connector is not damaged, replace the video lines. Ensure the lines are routed properly when re-installing the
display (A40/16).
- IF the complaint re-occurs after installation of the new video lines then proceed with replacement of the display
(A40/16).
If after the above measures are taken and the complaint still occurs please open a PTSS case with the following information:
- Initial quick test
12-23-2019 9:05 PM
© Copyright Mercedes-Benz
AG
CTENORE
Page 1/3
- Instrument cluster (N133/1) control unit log
- Display cluster (A40/16) control unit log
Symptoms
Communication/information / Information display / Displays / Multifunction display / Multifunction display, menu / Not
operable
Communication/information / Information display / Overall component / Instrument cluster, total failure / Malfunction
Control unit/fault code
Control unit
Fault code
Fault text
A40/16 - Display cluster 'Instrument cluster and head
unit' (ZAN) (DISP6) (A (177),
CLA (118))
-
-
Operation numbers/damage codes
Op. no.
Operation text
Time
Damage
code
Note
540SU 73
Attachments
instrument cluster display
dark.jpg:
12-23-2019 9:05 PM
© Copyright Mercedes-Benz AG
CTENORE
Page 2/3
12-23-2019 9:05 PM
© Copyright Mercedes-Benz AG
CTENORE
Page 3/3
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TSB/Document ID: LI54.30-P-069821
Replacement Service Bulletin Number:
MFR Communication Date: 2019-12-23
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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