NHTSA ID Number: 11003210
Manufacturer Communication Number: LI54.10-P-076820
TSB/Document Date: 2024-07-04
Summary
Complaint In the instrument cluster, the symbol for "12 V battery" and the message "Switch on vehicle" may sporadically be displayed. As a consequence of this, the fault codes B1FCB97 (=> N73/3) and U116000 (=> N73/3*1) are stored in the fault memory. In the subsequent analysis of the 12 V on-board electrical system data, the following parameters are noteworthy (see picture 1 in the attachment): • Charge balance negative when stationary. • Interior CAN bus is awake for an unusually long time while the vehicle was locked. • 12 V battery SOC (state of charge) during subsequent engine start is 45% or less. NOTE: This LI does not apply if the CEL was reported as being on without a 12V message. Once the 12 V battery SOC has exceeded 50% for the first time, the symbol and the message in the instrument cluster disappear again. Cause The door control unit (N69/x) may sporadically keep the interior CAN bus awake. Remedy Update the software and coding on all 4 door control units (N69/1, N69/2, N69/3 and N69/4): • To do so, a commissioning process must be started in the door control unit, left-hand front door (N69/1). The remaining door control units (N69/2, N69/3 and N69/4) are commissioned at the same time, in an automated process.( Path: Xentry Scope; Control Units View; TSG-XX (N69/1); Adaptations; Commissioning) • The repair software has been available since 02.02.2024 and the new SCN coding since 04.06.2024. • The measures are only 100% effective if the combination of "Repair software + new SCN coding" is used. SW item numbers of the repair software: • A2069020310 for the door control units on the front doors (N69/1 and N69/2) • A2069020410 for the door control units on the rear doors (N69/3 and N69/4)
In the instrument cluster, the symbol for "12 V battery" and
the message "Switch on vehicle" sporadically appears
Topic number
LI54.10-P-076820
Version
7
Function group
54.10 - Battery, power supply, voltage converter
Date
6/10/24
Validity
MODEL 206 up to production 12/15/23
MODEL 254 up to production 12/15/23
Reason for change
Remedy update
Complaint
In the instrument cluster, the symbol for "12 V battery" and the message "Switch on vehicle" may sporadically be displayed.
As a consequence of this, the fault codes B1FCB97 (=> N73/3) and U116000 (=> N73/3*1) are stored in the fault memory.
In the subsequent analysis of the 12 V on-board electrical system data, the following parameters are noteworthy (see
picture 1 in the attachment):
•
•
•
Charge balance negative when stationary.
Interior CAN bus is awake for an unusually long time while the vehicle was locked.
12 V battery SOC (state of charge) during subsequent engine start is 45% or less.
NOTE:
This LI does not apply if the CEL was reported as being on without a 12V message.
Once the 12 V battery SOC has exceeded 50% for the first time, the symbol and the message in the instrument cluster disappear again.
Attachments
File
Description
Bild 1_de.JPG
12 V on-board electrical system data (German)
29.06.2024 04:45
© Copyright Mercedes-Benz
AG
CCUSHWA
Page 1 / 3
Bild 1_en.JPG
12 V on-board electrical system data (English)
Cause
The door control unit (N69/x) may sporadically keep the interior CAN bus awake.
Remedy
Update the software and coding on all 4 door control units (N69/1, N69/2, N69/3 and N69/4):
•
•
•
To do so, a commissioning process must be started in the door control unit, left-hand front door (N69/1). The remaining door control units (N69/2, N69/3 and N69/4) are commissioned at the same time, in an automated process.(Path: Xentry Scope; Control Units View; TSG-XX (N69/1); Adaptations; Commissioning)
The repair software has been available since 02.02.2024 and the new SCN coding since 04.06.2024.
The measures are only 100% effective if the combination of "Repair software + new SCN coding" is used.
SW item numbers of the repair software:
• A2069020310 for the door control units on the front doors (N69/1 and N69/2)
• A2069020410 for the door control units on the rear doors (N69/3 and N69/4)
NOTES:
29.06.2024 04:45
© Copyright Mercedes-Benz AG
CCUSHWA
Page 2 / 3
•
•
Only one commissioning process may be invoiced for, namely that for the door control unit, left-hand front door
(SSL 7222054). This is because the remaining door control units are commissioned at the same time and in an
automated process.
All other work (including charging process, etc.) that may have been caused by the door control unit, may also
only be invoiced for through the damage code of the door control unit, left-hand front door (7222054).
Disclaimer
NOTE: The information contained in this document is intended for use by trained, professional technicians with the
knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz
approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and
provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect
is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a
symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes
resulting in the same or similar symptoms or conditions described in this document, and trained professional service
technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained
in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way.
Symptoms
Overall vehicle > Power supply > Battery/On-board electrical system > Battery/on-board electrical system display
message > Low voltage Charge battery
Control unit/fault code
Control unit
Fault text
N73/3 - Electronic ignition lock (EZS) (EZS223)
B1FCB97 - The starter battery has a malfunction. The
system function is restricted.
N73/3*1 - Electronic ignition lock - Central gateway (EZS) U116000 - A bus keepawake unit was detected. _
(GW223)
Operation numbers/damage codes
Op. no.
Operation text
Time
Damage
code
Note
7222054
7223054
73A3054
73N3054
29.06.2024 04:45
© Copyright Mercedes-Benz AG
CCUSHWA
Page 3 / 3
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TSB/Document ID: LI54.10-P-076820
Replacement Service Bulletin Number:
MFR Communication Date: 2024-06-11
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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