Service bulletin LI00.00-P-079603
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 11023033 |
| Published by NHTSA | 2025-09-09 |
| Manufacturer's number | LI00.00-P-079603 |
| Manufacturer's date | 2025-09-08 |
| NHTSA component | ELECTRICAL SYSTEM |
NHTSA's summary
Complaint The OTA software update prepares the SRS/ORC controller and enables it to be updated remotely in the future. Based on technician feedback, the OTA (code: 25P5496529) does not start even after an extended period of time and several driving cycles. In addition, the "Continue" button is grayed out. Cause The exact cause for the OTA not to start is currently under analysis. Remedy Please check whether the vehicle is affected by the field measure "Update software of Supplemental Restraint System (SRS) control unit" (code: 25P5496529) and if yes, perform this update using a XENTRY with all latest Add-Ons and bill under accounting number 5496529. If the vehicle is not affected by this field measure, in the event of a complaint update control unit ORC223 using XENTRY and use damage code 8251M01. As of XENTRY Release Version 06/25, control unit ORC223 can also be updated in this context without a password. Provided control unit ORC223 is error-free after the update, the vehicle can be handed back. ***IMPORTANT*** -In isolated cases, the OTA update may continue to be displayed for up to 3-4 weeks even after flashing with XENTRY. Note: This LI applies only to the OTA update for occupant protection!
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Electrical system
| MERCEDES-BENZ AMG C63 S E | 2023 to 2024 |
|---|---|
| MERCEDES-BENZ AMG EQE | 2023 to 2024 |
| MERCEDES-BENZ AMG EQE SUV 4MATIC | 2024 to 2025 |
| MERCEDES-BENZ AMG EQS | 2022 to 2024 |
| MERCEDES-BENZ AMG GT63 S E | 2025 (the catalog's model; the bulletin names a series or trim of it) |
| MERCEDES-BENZ AMG S 63 E 4MATIC+ | 2023 to 2025 |
| MERCEDES-BENZ AMG SL63 S E | 2024 to 2025 |
| MERCEDES-BENZ C 350 E | 2020 |
| MERCEDES-BENZ EQE 350 4MATIC | 2023 to 2025 |
| MERCEDES-BENZ EQE 350+ | 2023 to 2024 |
| MERCEDES-BENZ EQE 500 4MATIC | 2023 to 2024 |
| MERCEDES-BENZ EQE SUV 350 4MATIC | 2023 to 2025 |
| MERCEDES-BENZ EQE SUV 350+ | 2023 to 2025 |
| MERCEDES-BENZ EQE SUV 500 4MATIC | 2023 to 2025 |
| MERCEDES-BENZ EQS 450 4MATIC | 2023 to 2024 |
| MERCEDES-BENZ EQS 450+ | 2022 to 2024 |
| MERCEDES-BENZ EQS 580 4MATIC | 2022 to 2023 |
| MERCEDES-BENZ EQS SUV 450 4MATIC | 2023 to 2025 |
| MERCEDES-BENZ EQS SUV 450+ | 2023 to 2025 |
| MERCEDES-BENZ EQS SUV 580 4MATIC | 2023 to 2025 |
| MERCEDES-BENZ GLC 350 E | 2020 to 2021 |
| MERCEDES-BENZ GLC 350 E 4MATIC | 2025 |
| MERCEDES-BENZ S 580 E 4MATIC | 2023 |
| MERCEDES-BENZ S 580 E 4MATIC | 2025 |
| MERCEDES-MAYBACH EQS SUV 680 4MATIC | 2024 to 2025 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 25V129000 | 2025-02-28. ELECTRICAL SYSTEM:PROPULSION SYSTEM |
|---|
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| OTA-Comm. Mod. SW. Update | 2026-10-06. Over-the-air update. A software update will be performed that provides enhancements to the robustness and system stability of the communication module. The update is free of charge and runs in the background, which takes about 8 minutes to install. During this time, the vehicle can be driven without any restrictions, and the new software will be active with the next ignition cycle. Remedy MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customer’s vehicle free of charge and do not require a dealer visit. |
|---|---|
| LI54.71-P-079104 | 2026-10-02. Service bulletin. Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious cause usually with one of the following scenarios: • Flashing without a speed limit ("‑ ‑"). • Flashing when current vehicle speed is under speed limit. • Flashing between US speed limit symbol and European speed limit symbol. NOTE: • Verify that the concern falls under one of the attachment videos. If not, then it is outside of the scope of this LI. • This also does not cover "Traffic Sign Inoperative" messages on the instrument cluster. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy Update head unit software to latest version and the re‑check function in the same location. NOTE: Updated head unit software for AMG's has NOT been released yet. ETA 12/2026. If vehicle is still exhibiting one of the symptoms as described exactly as in the complaint section or as shown in the video attachments, open a TIPS case to the Body/Chassis/Entertainment inbox with the following: • Video of the concern. • Exact location (latitude and longitude is best) |
| LI54.21-P-080326 | 2026-10-02. Service bulletin. Complaint CEL light on with no drivability concerns. Cause Signal timing error. Remedy 167, 465: SW has been released. Update the FSAM to the latest SW version. 290, 118, 243, 247: Software is still in development. This fault code does not cause a drivability concern and will clear itself within 2‑ 3 key cycles. The vehicle can be released back to the customer. |
| LI54.71-P-079104 | 2026-09-02. Service bulletin. Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious cause usually with one of the following scenarios: • Flashing without a speed limit ("‑ ‑"). • Flashing when current vehicle speed is under speed limit. • Flashing between US speed limit symbol and European speed limit symbol. NOTE: • Verify that the concern falls under one of the attachment videos. If not, then it is outside of the scope of this LI. • This also does not cover "Traffic Sign Inoperative" messages on the instrument cluster. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy Update head unit software to latest version and the re‑check function in the same location. If vehicle is still exhibiting one of the symptoms as described exactly as in the complaint section or as shown in the video attachments, open a TIPS case to the Body/Chassis/Entertainment inbox with the following: • Video of the concern. • Exact location (latitude and longitude is best) |
| LI54.10-P-080880 | 2026-08-14. Service bulletin. Complaint Customer Complaint: - AC charging is not possible. - The departure time, charging pause, location-based charging or target SOC limit is automatically set to 50% or to a random value in the Mercedes me application or in the charging settings on the head unit display. (Picture 1 & 3) - Incorrect notifications appear in the Mercedes me application for charging-related functions. (Picture 2) Related DTCs in quick test: No related fault codes (DTCs) are stored in the relevant control units. CPC3 - N127 (Drivetrain control unit) OBL223_GEN4 - N83/11 (Alternating current charger for high-voltage battery) DCB223 - N116/5 - Direct current charge connection unit (DCCU) Picture1 The target SOC limit is automatically set to 50% or any random values during charging. Picture 2 Incorrect notification Example “Unable to unlock charging cable. Picture 3 Incorrect settings of charge interruption or pause. (If applicable) Cause - The Customer shares their Mercedes me credentials (password) with a third-party application, for example, a wall box application. This causes the Mercedes Benz backend server to receive random requests to reset the maximum SOC, departure time, charging pause, etc. - Charging settings are set incorrectly, for example, incorrect departure time, charging program, charging interruption/ pause, etc. Remedy The remedies below may vary depending on the customer complaint. Refer to the remedy that best matches the customer complaint. Remedy 1: The target SOC limit is automatically set to 50% or to random values during charging. - Change the Mercedes me login password on the Mercedes me homepage. (My Account > Login and Security > Reset). (Refer to Annex 1). Previously granted authorizations should then be revoked so that the charging settings can no longer be changed by external applications. Advise customers not to share the new password again. - Are there any sub-users? If yes, revoke their rights and reassess the function. -If differences between the vehicle and the Mercedes me app are visible, a new synchronization is recommended. Turn off Digital Extras through the Mercedes me app or the MMCR portal, and then turn the services on again. Remedy 2: Incorrect notifications in the Mercedes me app for charging-related functions. - Restart synchronization between the app and backend. Turn off Digital Extras through the Mercedes me app or the MMCR portal, and then turn the services on again. (Refer to Annex 2) Remedy 3: Incorrect charge interruption or pause setting. - Perform a factory reset of the head unit (A26/17). (Home > Functions > System > Reset), or turn off/correct all charging settings. (Refer to Annex 3) Additional Information: (Good to know) The LED on the charging inlet or socket indicates whether charging is completed or paused. 1) If the target SOC is reached, the charging inlet LED lights up Blue/Green without flashing. 2) If charging is paused, the charging inlet LED lights up orange without flashing. Additionally, the head unit charging settings display a charging pause. Note: Do not replace any hardware components for these complaints. If the complaint cannot be solved, please contact via TIPS or CAC. |
| LI54.65-P-080132 | 2026-08-12. Service bulletin. Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist Inoperative" on Instrument Cluster 5. Cameras 6. Other Park Topics. Cause Various root causes Remedy See attached diagnostic guide. |
| LI82.60-P-080806 | 2026-08-11. Service bulletin. Complaint DAB, FM, or SDARS radio reception is limited, only a few stations are found. Cause The firmware installation was incomplete. Remedy In the A26/17 control unit "MBUX multimedia system" (head unit), use XENTRY to carry out the special process "All Modules"; this will reinstall the firmware completely. |
| LI82.60-P-080806 | 2026-07-27. Service bulletin. Complaint After an "Over the Air" update (OTA), FM or SDARS radio reception is limited; only a few stations are found. Cause The firmware installation was incomplete. Remedy In the A26/17 control unit "MBUX multimedia system" (head unit), use XENTRY to carry out the special process "All Modules"; this will reinstall the firmware completely. |
| LI54.21-P-080326 | 2026-07-24. Service bulletin. Complaint CEL light on with no drivability concerns. Cause Signal timing error. Remedy 167, 465: SW has been released. Update the FSAM to the latest SW version. 290, 118, 243, 247: Software is still in development. This fault code does not cause a drivability concern and will clear itself within 2-3 key cycles. The vehicle can be released back to the customer. |
| LI54.71-P-079104 | 2026-07-14. Service bulletin. Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious cause usually with one of the following scenarios: • Flashing without a speed limit ("- -"). • Flashing when current vehicle speed is under speed limit. • Flashing between US speed limit symbol and European speed limit symbol. NOTE: • Verify that the concern falls under one of the attachment videos. If not, then it is outside of the scope of this LI. • This also does not cover "Traffic Sign Inoperative" messages on the instrument cluster. Cause There are two identified reasons for this concern: 1. Country code information stored incorrectly at a particular geographic latitude range. 2. Incorrect reference data when the vehicle is started and a GPS signal is not immediately available. Remedy Do not replace parts. Please open a TIPS case to the Body/Chassis/Entertainment inbox but read the below carefully: • The vehicle must be exhibiting the concern as shown in the attachment videos. • The vehicle DOES NOT need to be at the dealer, nor does it need to be brought into the dealership. • If the geographic location is known, it is very important that it is provided. • Provide any pictures or videos, if available. A new software for the head unit is scheduled for tentative release in Q3 2026. |