News Channel Update |

Vehicle Compliance & Analysis

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

Recall Launch Notification
February 6, 2026

Campaign #

CA DMV #

Description

2025040001

250401

24P5496502

Update Engine Control Unit
Software (Air-to-Fuel Ratio)

Campaign Details
Total Recall Population
Vehicles in Dealer Inventory
Model Year(s)
Issue

What We’re Doing
Remedy
Launch Date
Approximate Customer
Notification Date
Warranty Claim Notice

10,605 (Total Population)
9,483 (Initial Population) + 1,122 (Additional
Population)
N/A

Model(s)/
Platform(s)

C-Class, G-Class, SL (206, 463, 232)

2023
Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject
vehicles, the engine control software might not meet current specifications. As a result, the diagnosis routine for
monitoring the air-fuel ratio might not be activated as intended and a malfunction in the oxygen sensor could be
erroneously detected causing the “check engine” Malfunction Indicator Lamp (‘MIL’) to illuminate.
MBUSA will conduct a voluntary emissions recall. An authorized Mercedes-Benz dealer will update the engine
control unit software.
The remedy software is available and can be performed at this time.
Affected VINs were flagged in VMI as “OPEN” on Friday, June 13, 2025. Additional affected VINs will be flagged
as “OPEN” on Friday February 6, 2026.
Friday, June 27, 2025
Additional mailings will be sent out on Friday, February 20, 2026.
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.

Notice to California Dealers: As required by 13 CCR 2117, a proof of correction (“POC”) certificate showing that the vehicle has
been repaired under this recall must be issued by the authorized service facility, and that such a certificate may be required by
California as a condition of vehicle re-registration or operation. Please reference this POC in the attached work instructions.
Failure to complete this step may result in fines and penalties and lead to customer dissatisfaction.

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

June 2025
Rev. A - February 6, 2026
TO:

ALL MERCEDES-BENZ CENTERS

CAMPAIGN NO.

2025040001

CAMPAIGN DESC.

24P5496502

NHTSA ID

250401

SUBJECT

Update Engine Control Unit Software (Air-to-Fuel Ratio)

MODEL(S)
MODEL YEAR(S)
CAMPAIGN POPULATION

C-Class, G-Class and SL (206, 463 and 232 platform)
2023
10,605 = 9,483 (Initial) + 1,122 (Amendment)

Campaign Technical Instructions
Prior to performing this Campaign:
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):
-

Additional vehicles added to population

Order No. P-RC-2025040001

Update Engine Control Unit Software (Air-to-Fuel Ratio)
Model(s): 206, 463 and 232

2

• 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 Engine Control Unit software.
To do so, select menu item "Quick test view → N3/10 – Motor electronics ‘MED1775’ or ‘MRG2AMG’ for
‘M176’, ‘M177’ or ‘M139’ (ME) → Adaptations → Control unit update → Updating of the 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

54 965 02

*

Description

Labor Time
(hrs.)

02-9334

Update N3/10 – Motor electronics (ME) control unit software
(with 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 Repair Order (RO).

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.

P-RC-2025040001

Update Engine Control Unit Software (Air-to-Fuel Ratio)
Model(s): 206, 463 and 232

3

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 is unique and must be entered as such (250401), your “Dealer
Code”, and the “Date” of the repair, using a black permanent marker.
Note: Clean bonding surface prior to affixing label.

Figure 1
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 (250401).

Figure 2
California Proof of Correction 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)
Damage Code

Operation

Description

Labor Time
(hrs.)

Apply Proof of Correction Label and completed Proof of Correction
Certificate

0.1

Number

212CA 00

02-0001

P-RC-2025040001