LI54.10-P-071832 Service Bulletin/Repair Instructions

Vehicle cannot be unlocked/ vehicle

does not start - starter battery

discharged

Topic number

Version
LI54.10-P-071832

1
Function group
54.10 Battery, power supply, voltage converter
Date
10-15-2020
Validity

Reason for change Reason
Model series 177, model series 118, model series 247
for block
Complaint:

- Vehicle cannot be unlocked/ vehicle does not start

- Display message in instrument cluster "Battery - Start Engine - see Operator's Manual"
Attachments

File
Description
Beispiel_Buswachhalter.pdf
Example for reading bus keepawake event from

electrical system data
Beispiel Kl. 15 EIN_de.pdf
Example for terminal 15 ON
example terminal 15 active.pdf
Example for terminal 15 ON
example_BUS_keep_awake.pdf
Example for bus keepawake event
Cause:

Bus keepawake control units are flagged up by event code U116000 "A bus keepawake control unit has been

detected" in the electronic ignition switch (EZS) control unit.

1. Concerns all vehicles with code 631/632/640/641/642

LED Head Light Module control unit is keeping the bus awake.
2. One of the following control units is keeping the bus awake

ALC, IC, BC, CPC, ESP
3. Continue with the analysis (create a PTSS case)
10-15-2020 6:59 PM

© Copyright Mercedes-Benz AG
RUTHERE

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The following information is required for the analysis:

- Control unit event log of electronic ignition lock, EZS (N73)

- Control unit event log of SAM-F (N10/6)

- Up-to-date no-load current measurement

Discuss the following questions with the customer:

- Were there any messages in the instrument cluster?

- Did this behavior occur once only, or has it occurred before? If so, when (approximately)?

- Was the vehicle parked in a particular location or with high traffic levels?

- Has the vehicle been modified or are there any installations in the vehicle?
Remedy:

1. Concerns only vehicles with code 631/632/640/641/642

Flash LED Head Light Module control unit with the latest software release.

Invoice under damage code 82B01- 73

2. Flash with the latest software in each case and invoice under the relevant damage code.
Symptoms

Overall vehicle / Power supply / Battery/On-board electrical system / Battery function / Battery discharges

Overall vehicle / Power supply / Battery/On-board electrical system / Battery function / Battery cannot be charged

Overall vehicle / Power supply / Battery/On-board electrical system / Battery/on-board electrical system display

message / Low voltage Charge battery

Overall vehicle / Power supply / Battery/On-board electrical system / Battery/on-board electrical system display

message / Charging
Parts

Part number
ES1 ES2 Designation
Quantity Note
EPC
A 001 982 81 08
80 Ah starter battery
1
X
A 001 982 82 08
92 Ah starter battery
1
X
A 001 982 80 08
70 Ah starter battery
1
X
A 001 982 79 08
60 Ah starter battery
1
X
Operation numbers/damage codes

Op. no.
Operation text
10-15-2020 6:59 PM

© Copyright Mercedes-Benz AG
Time
Damage

code
Note
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54-1011
PERFORM QUICK TEST
Use the damage code for the

component causing the damage!
54-0640
CHECK BATTERY SYSTEM (AFTER

QUICK TEST)
Use the damage code for the

component causing the damage!
54-1109
CHECK CONDITION OF BATTERY
Use the damage code for the

component causing the damage!
54-1126
REPLACE BATTERY (AFTER CHECK)
Use the damage code for the

component causing the damage!
54-0650
MAINTAIN ON-BOARD ELECTRICAL

SYSTEM VOLTAGE (FOR TESTING

AND DIAGNOSIS WORK)
Use the damage code for the

component causing the damage!
54-0991
PROGRAM CONTROL UNIT ...............

(AFTER QUICK TEST)
Use the damage code for the

component causing the damage!
54-0992
CODE CONTROL UNIT............. (AFTER QUICK TEST)
Use the damage code for the

component causing the damage!
54-0645
CHECK NO-LOAD CURRENT

CONSUMPTION
Use the damage code for the

component causing the damage!
54-2536
REPLACE ELECTRONIC IGNITION

LOCK CONTROL UNIT (AFTER

QUICK TEST)
Use the damage code for the

component causing the damage!
WIS-References

Document number
Title
AR54.10-P-1129LW
Battery - Check condition
Cause
AR54.10-P-1130LW
Charge battery
Remedy
AR54.21-P-0038ME
Remove/install electronic

ignition lock control unit
Remedy
10-15-2020 6:59 PM

© Copyright Mercedes-Benz AG
Note
Allocation
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10-15-2020 6:59 PM

© Copyright Mercedes-Benz AG
RUTHERE

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10-15-2020 6:59 PM

© Copyright Mercedes-Benz AG
RUTHERE

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