Service Campaign 2024020014 - Update Battery Module Control Unit Software (P-SC-2024020014)

Publication date: 2024-07-18
Reference number: P-SC-2024020014

SERVICE CAMPAIGN 2024020014 - UPDATE BATTERY MODULE CONTROL UNIT SOFTWARE

SERVICE CAMPAIGN BULLETIN

Reference Number(s): P-SC-2024020014, Date of Issue: July 18, 2024

MERCEDES-BENZ:

Model C-Class, E-Class, S-Class, CLE and GLC (206, 214, 223, 236 and 254 platform) Model Year 2023 - 2024

SERVICE INFORMATION

IMPORTANT NEW EMISSION SERVICE CAMPAIGN INFORMATION

Please note that all customer inquiries should be directed to the Customer Assistance Center at 1-800-FOR-MERCEDES.

Sincerely,

Gregory Gunther

Senior Manager, Vehicle Compliance & Analysis

Mercedes-Benz

July 2024

TO: ALL MERCEDES-BENZ CENTERS

SUBJECT

Model C-Class, E-Class, S-Class, CLE and GLC

(206, 214, 223, 236 and 254 platform)

Model Year 2023 - 2024

Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2023 - 2024 C-Class (206 platform), E-Class (214 platform), S-Class (223 platform), CLE (236 platform), and GLC (254 platform) vehicles, the 48-volt battery module (BM48) control unit software does not correspond to the current series production configuration. It is therefore possible that the battery's state of health is calculated incorrectly, thereby falsely illuminating check engine light 'MIL' (malfunction indicator lamp). An authorized Mercedes-Benz dealer will update the BM48 control unit software on the affected vehicles.

Prior to performing this Campaign:

VMI must be checked before performing campaigns to verify that the campaign is required on a specific vehicle. Always check for any other open campaigns and perform accordingly.
Please review the entire Campaign bulletin and follow the repair procedure exactly as described.

Approximately 42,079 vehicles are affected.

Order No. P-SC-2024020014

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 system battery (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

Connect XENTRY Diagnosis.
Update A66 - Battery module (48 V battery) (BM48) control unit software.
To do this, select menu item "Quick test view → A66 - Battery module (48 V Battery) (BM48) → Adaptations → Control unit update → Update of control unit software".

Then follow the user guidance in XENTRY Diagnosis.
Disconnect XENTRY Diagnosis.
Check whether any fault messages are displayed in the instrument cluster after the software update.
1. If faults are displayed in the instrument cluster, continue with WORK PROCEDURE Step 5.
2. If no faults are displayed in the instrument cluster, end measure.
Disconnect ground line of 12 V on-board electrical system battery, wait 10 seconds, and reconnect.
Required to perform a reset.

NOTE: The following allowable labor operation should be used when submitting a warranty claim for this repair:

WARRANTY INFORMATION

Damage Code

Operation Number

Description

Labor Time (hrs.)

54 991 13

02-9334

Update A66 - Battery module (48 V Battery) (BM48) control unit software (with XENTRY Diagnosis connected)

0.1

02-4762 ⁽¹⁾

Connect/disconnect diagnostic system (XENTRY Diagnosis)

0.1

02-5058 ⁽¹⁾

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

0.1

12-1966 ⁽¹⁾

Disconnect/connect battery of 12 V on-board electrical system (after software update) in vehicle with fault message in instrument cluster
Model: 206

0.4

12-1966 ⁽¹⁾

Disconnect/connect battery of 12 V on-board electrical system (after software update) in vehicle with fault message in instrument cluster
Model: 214

0.1

12-1966 ⁽¹⁾

Disconnect/connect battery of 12 V on-board electrical system (after software update) in vehicle with fault message in instrument cluster
Model: 223, 236, 254

0.3

⁽¹⁾	Invoice operation item only once for each workshop 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.

The following step applies to California dealers only.

Apply Proof of Correction Label (A 000 584 54 13) to area identified in Figure 1. Fill in the blank areas of the label. The "Campaign No." for the California Proof of Correction Label is unique and must be entered as such (240214), your "Dealer Code", and the "Date" of the repair, using a black permanent marker.

NOTE: Clean bonding surface prior to affixing label.

The following step applies to California dealers only.

Provide the owner with the completed and signed Proof of Correction Certificate (A 000 584 42 14) (Figure 2), after you scan a completed form and attach to the RO. The recall number for the California Proof of Correction Certificate is unique and must be entered as such (240214).

CALIFORNIA PROOF OF CORRECTION PARTS INFORMATION

PARTS INFORMATION

Qty.	Part Name	Part Number
1	Proof of Correction Certificate (CA Dealers Only)	A 000 584 42 14
1	Proof of Correction Label (CA Dealers Only)	A 000 584 54 13

WARRANTY INFORMATION (CALIFORNIA DEALERS PLEASE SUBMIT CLAIM ON A SEPARATE LINE OF THE SAME RO AS THE CAMPAIGN)

WARRANTY INFORMATION

Damage Code	Operation Number	Description	Labor Time (hrs.)
212CA 00	02-0001	Apply Proof of Correction Label and completed Proof of Correction Certificate	0.1