News Channel Update |

Vehicle Compliance & Analysis

ATTENTION: Mercedes-Benz Dealer Principals, General Managers, Sales Managers, Service Managers & Parts Managers

Service Campaign Notification
January 16, 2026
Campaign #

Description

2025120010

25P5496611

Update 48V Battery
Control Unit Software
Campaign Details

Total Population 779

Model(s)/
Platform(s)

Model Year(s) 2023-2026

S-Class, GLC & EQE (223, 254, 294
platforms)

Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain
subject vehicles, the 48V battery control unit (48 V LIB) software does not meet current production
Issue
specifications. A miscalculation of the 48V battery’s aging threshold may trigger a fault message in the
instrument cluster.
Remedy

MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update software in
the 48V battery control unit (48 V LIB).

Launch Date Affected VINs will be flagged as “OPEN” in VMI on Friday, January 16, 2026.
Warranty Claim Notice

Please note the campaign will close after the warranty claim has been submitted. This change can
take at least one-day to reflect in NetStar VMI.

While we regret any inconvenience this may cause, MBUSA is determined to maintain a high level of vehicle quality and
customer satisfaction. Please refer all customer inquiries to the Customer Care Center at 1-800-FOR-MERCEDES.

Mercedes-Benz USA, LLC
One Mercedes-Benz Drive

A Mercedes-Benz Group AG Company

Sandy Springs, GA 30328

770.705.0600

January 2026
Rev. January 31, 2025
TO:

ALL MERCEDES-BENZ DEALERS

CAMPAIGN NO.

2025120010

CAMPAIGN DESC.

25P5496611

SUBJECT
MODEL(S)
MODEL YEAR(S)
CAMPAIGN POPULATION

Update 48-V Battery Control Unit Software
S-Class, GLC & EQE (223, 254 & 294 platform)
2023 – 2026
779

Service Campaign Bulletin

Service Campaign Bulletin

Service Campaign Bulletin

Campaign Technical Instructions

Check the Vehicle Master Inquiry (VMI) to verify this campaign applies to the specific vehicle.
1. Always check for other open campaigns and perform them accordingly!
2. Review the entire campaign bulletin first, and perform the procedures exactly as described.
California registered vehicles require a Proof of Correction Label and Certificate, according to California Code
Regulation Title 13, § 2117 – Proof of Correction Certificate.
Non-California dealers may perform the remedy on California registered vehicles, however, please direct
those customers to visit their preferred California dealership to receive the Proof of Correction Label and the
Certificate after the recall has been completed.
Revision Note(s):

Order No. P-SC-2025120010

Service Campaign Bulletin

Service Campaign Bulletin

Service Campaign Bulletin

Prior to performing this Campaign:

2

UPDATE 48-V BATTERY CONTROL UNIT SOFTWARE

Model(s): 223, 254 & 294
• Always use the latest XENTRY Diagnosis software release with all available add-ons.
• Follow the operation steps exactly as described in XENTRY Diagnosis.
• Use a charger to ensure sufficient power supply to the vehicle’s on-board electrical battery system
(greater than 12.5 V).
• If XENTRY Diagnosis is already connected to the vehicle, start with Work Procedure Step 2.
If two or more software updates or SCN codings are performed during a single workshop visit, operation items
02-4762 and 02-5058 may be invoiced only on one of the workshop orders.

Work Procedure
1. Connect XENTRY Diagnosis.
2. Update 48 V battery (48 V LIB) control unit software.
To do so, select menu item "Quick test view → G1/24 – 48 V battery (48 V LIB) → Adaptations →
→ Control unit update → Updating of control unit software".
Then follow the user guidance in XENTRY Diagnosis.

3. Disconnect XENTRY Diagnosis.

Warranty Information
Note: The following allowable labor operation should be used when submitting a warranty claim for this repair:
Damage

Operation

Code

Number

54 966 11

*

Description

Labor Time
(hrs.)

02-9334

Update 48 V battery (48 V LIB) control unit software
(XENTRY Diagnosis connected)

0.1

02-4762*

Connect/disconnect diagnosis system
(XENTRY Diagnosis)

0.1

02-5058*

Connect/disconnect starter battery charger
(with XENTRY Diagnosis connected)

0.1

Invoice operation item only once for each workshop Repair Order.

Note: Always check Xentry Operation Time (XOT) for the current OP-Code times. Labor times are subject to change
and updates may not be reflected in this document.

1

P-SC-2025120010