# Service bulletin LI54.71\-P\-079104 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: 11036608 - Published by NHTSA: 2026\-09\-02 - Manufacturer's number: LI54.71\-P\-079104 - Manufacturer's date: 2026\-08\-22 - NHTSA component: ELECTRICAL SYSTEM ## NHTSA's summary 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 \(latitude and longitude is best\) ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036608-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036608-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system ## Vehicles listed - 2026 MERCEDES BENZ AMG GLE53 4MATIC - 2026 MERCEDES BENZ AMG GLE53 4MATIC\+ - 2026 MERCEDES BENZ AMG GLE53 4MATIC\+ COUPE - 2026 MERCEDES BENZ AMG GLE63 S 4MATIC - 2025 to 2026 MERCEDES BENZ AMG GLE63 S 4MATIC\+ - 2026 MERCEDES BENZ AMG GLE63 S 4MATIC\+ COUPE - 2026 MERCEDES BENZ AMG GLS63 4MATIC - 2026 MERCEDES BENZ AMG GLS63 4MATIC\+ - 2026 MERCEDES BENZ AMG GLS63 4MATIC\+ COUPE - 2025 to 2026 MERCEDES BENZ GLE 350 - 2026 MERCEDES BENZ GLE 450E 4MATIC - 2026 MERCEDES BENZ GLE 580 4MATIC - 2026 MERCEDES BENZ GLS 450 4MATIC - 2026 MERCEDES BENZ GLS 580 4MATIC - 2023 to 2024 MERCEDES\-BENZ AMG C43 - 2023 to 2026 MERCEDES\-BENZ AMG C43 4MATIC - 2024 MERCEDES\-BENZ AMG C63 S E - 2024 to 2025 MERCEDES\-BENZ AMG C63 S E 4MATIC\+ - 2026 MERCEDES\-BENZ AMG C63 S E PERFORMANCE 4MATIC\+ - 2026 MERCEDES\-BENZ AMG CLE53 4MATIC CABRIOLET - 2026 MERCEDES\-BENZ AMG CLE53 4MATIC COUPE - 2025 MERCEDES\-BENZ AMG CLE53 4MATIC\+ - 2025 MERCEDES\-BENZ AMG CLE53 4MATIC\+ CABRIOLET - 2025 MERCEDES\-BENZ AMG E 53 E 4MATIC\+ - 2023 to 2025 MERCEDES\-BENZ AMG EQE - 2023 to 2026 MERCEDES\-BENZ AMG EQE 4MATIC\+ - 2024 to 2025 MERCEDES\-BENZ AMG EQE SUV 4MATIC - 2026 MERCEDES\-BENZ AMG EQE SUV 4MATIC\+ - 2022 to 2024 MERCEDES\-BENZ AMG EQS - 2022 MERCEDES\-BENZ AMG EQS 4MATIC - 2023 to 2025 MERCEDES\-BENZ AMG EQS 4MATIC\+ - 2024 to 2026 MERCEDES\-BENZ AMG GLC43 - 2024 to 2026 MERCEDES\-BENZ AMG GLC43 4MATIC - 2024 to 2025 MERCEDES\-BENZ AMG GLC43 4MATIC COUPE - 2026 MERCEDES\-BENZ AMG GLC43 COUPE - 2025 MERCEDES\-BENZ AMG GLC63 S E - 2025 to 2026 MERCEDES\-BENZ AMG GLC63 S E 4MATIC\+ - 2025 to 2026 MERCEDES\-BENZ AMG GLC63 S E 4MATIC\+ COUPE - 2021 to 2022 MERCEDES\-BENZ AMG GLE53 - 2023 to 2025 MERCEDES\-BENZ AMG GLE53 4MATIC\+ - 2023 to 2025 MERCEDES\-BENZ AMG GLE53 4MATIC\+ COUPE - 2021 to 2022 MERCEDES\-BENZ AMG GLE53 COUPE - 2021 to 2022 MERCEDES\-BENZ AMG GLE63 S - 2023 to 2024 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+ - 2023 to 2025 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+ COUPE - 2021 to 2022 MERCEDES\-BENZ AMG GLE63 S COUPE - 2021 to 2022 MERCEDES\-BENZ AMG GLS63 - 2026 MERCEDES\-BENZ AMG GLS63 - 2023 to 2025 MERCEDES\-BENZ AMG GLS63 4MATIC\+ - 2025 to 2026 MERCEDES\-BENZ AMG GT43 - 2024 to 2025 MERCEDES\-BENZ AMG GT55 - 2024 to 2026 MERCEDES\-BENZ AMG GT55 4MATIC\+ - 2024 to 2026 MERCEDES\-BENZ AMG GT63 - 2025 to 2026 MERCEDES\-BENZ AMG GT63 4MATIC\+ - 2026 MERCEDES\-BENZ AMG GT63 PRO 4MATIC\+ - 2024 to 2026 MERCEDES\-BENZ AMG S 63 E 4MATIC\+ - 2023 to 2026 MERCEDES\-BENZ AMG SL43 - 2022 to 2025 MERCEDES\-BENZ AMG SL55 - 2023 to 2026 MERCEDES\-BENZ AMG SL55 4MATIC\+ - 2022 to 2023 MERCEDES\-BENZ AMG SL63 - 2025 MERCEDES\-BENZ AMG SL63 - 2023 to 2026 MERCEDES\-BENZ AMG SL63 4MATIC\+ - 2024 to 2025 MERCEDES\-BENZ AMG SL63 S E - 2025 to 2026 MERCEDES\-BENZ AMG SL63 S E PERFORMANCE 4MATIC\+ - 2022 to 2026 MERCEDES\-BENZ C 300 - 2022 to 2026 MERCEDES\-BENZ C 300 4MATIC - 2024 MERCEDES\-BENZ CLE 300 - 2024 to 2025 MERCEDES\-BENZ CLE 300 4MATIC - 2024 to 2026 MERCEDES\-BENZ CLE 300 4MATIC CABRIOLET - 2026 MERCEDES\-BENZ CLE 300 4MATIC COUPE - 2024 MERCEDES\-BENZ CLE 450 - 2024 to 2025 MERCEDES\-BENZ CLE 450 4MATIC - 2024 to 2026 MERCEDES\-BENZ CLE 450 4MATIC CABRIOLET - 2026 MERCEDES\-BENZ CLE 450 4MATIC COUPE - 2025 to 2026 MERCEDES\-BENZ E 350 - 2024 to 2026 MERCEDES\-BENZ E 350 4MATIC - 2024 MERCEDES\-BENZ E 450 - 2024 to 2026 MERCEDES\-BENZ E 450 4MATIC - 2024 to 2026 MERCEDES\-BENZ E 450 4MATIC ALL\-TERRAIN - 2025 MERCEDES\-BENZ E53 E 4MATIC\+ - 2026 MERCEDES\-BENZ E53 E 4MATIC\+ ALL\-TERRAIN - 2026 MERCEDES\-BENZ EQE 320 4MATIC - 2026 MERCEDES\-BENZ EQE 320\+ - 2023 to 2025 MERCEDES\-BENZ EQE 350 4MATIC - 2023 to 2026 MERCEDES\-BENZ EQE 350\+ - 2023 to 2025 MERCEDES\-BENZ EQE 500 - 2023 to 2025 MERCEDES\-BENZ EQE 500 4MATIC - 2026 MERCEDES\-BENZ EQE SUV 320 4MATIC - 2026 MERCEDES\-BENZ EQE SUV 320\+ - 2023 to 2025 MERCEDES\-BENZ EQE SUV 350 4MATIC - 2023 to 2025 MERCEDES\-BENZ EQE SUV 350\+ - 2023 to 2025 MERCEDES\-BENZ EQE SUV 500 4MATIC - 2022 MERCEDES\-BENZ EQS 450 - 2023 to 2026 MERCEDES\-BENZ EQS 450 4MATIC - 2022 to 2026 MERCEDES\-BENZ EQS 450\+ - 2022 to 2024 MERCEDES\-BENZ EQS 580 - 2022 to 2026 MERCEDES\-BENZ EQS 580 4MATIC - 2026 MERCEDES\-BENZ EQS SUV 400 4MATIC - 2023 to 2025 MERCEDES\-BENZ EQS SUV 450 4MATIC - 2023 to 2025 MERCEDES\-BENZ EQS SUV 450\+ - 2026 MERCEDES\-BENZ EQS SUV 550 4MATIC - 2023 to 2025 MERCEDES\-BENZ EQS SUV 580 4MATIC - 2023 to 2026 MERCEDES\-BENZ GLC 300 - 2023 to 2026 MERCEDES\-BENZ GLC 300 4MATIC - 2024 to 2026 MERCEDES\-BENZ GLC 300 4MATIC COUPE - 2024 MERCEDES\-BENZ GLC 300 COUPE - 2025 to 2026 MERCEDES\-BENZ GLC 350 E 4MATIC - 2026 MERCEDES\-BENZ GLC43 4MATIC COUPE - 2020 to 2023 MERCEDES\-BENZ GLE 350 - 2021 to 2026 MERCEDES\-BENZ GLE 350 4MATIC - 2022 MERCEDES\-BENZ GLE 350 4MATIC COUPE - 2020 to 2023 MERCEDES\-BENZ GLE 450 - 2021 to 2026 MERCEDES\-BENZ GLE 450 4MATIC - 2022 MERCEDES\-BENZ GLE 450 4MATIC COUPE - 2025 to 2026 MERCEDES\-BENZ GLE 450 4MATIC COUPE - 2024 to 2025 MERCEDES\-BENZ GLE 450E 4MATIC - 2020 to 2021 MERCEDES\-BENZ GLE 580 - 2021 to 2025 MERCEDES\-BENZ GLE 580 4MATIC - 2021 to 2022 MERCEDES\-BENZ GLE 580 4MATIC COUPE - 2020 MERCEDES\-BENZ GLS 450 - 2022 to 2025 MERCEDES\-BENZ GLS 450 4MATIC - 2020 MERCEDES\-BENZ GLS 580 4MATIC - 2022 to 2025 MERCEDES\-BENZ GLS 580 4MATIC - 2023 MERCEDES\-BENZ GLS 600 - 2021 MERCEDES\-BENZ GLS450 - 2021 MERCEDES\-BENZ GLS580 - 2021 MERCEDES\-BENZ S 500 - 2022 to 2026 MERCEDES\-BENZ S 500 4MATIC - 2021 MERCEDES\-BENZ S 580 - 2023 MERCEDES\-BENZ S 580 - 2022 to 2026 MERCEDES\-BENZ S 580 4MATIC - 2023 to 2026 MERCEDES\-BENZ S 580 E 4MATIC - 2024 to 2026 MERCEDES\-MAYBACH EQS SUV 680 4MATIC - 2021 MERCEDES\-MAYBACH GLS 600 - 2022 to 2026 MERCEDES\-MAYBACH GLS 600 4MATIC - 2021 MERCEDES\-MAYBACH S 580 - 2022 to 2026 MERCEDES\-MAYBACH S 580 4MATIC - 2023 to 2024 MERCEDES\-MAYBACH S 680 - 2022 to 2023 MERCEDES\-MAYBACH S 680 4MATIC - 2025 to 2026 MERCEDES\-MAYBACH S 680 4MATIC - 2026 MERCEDES\-MAYBACH SL 680 4MATIC\+ ## Recalls for the same vehicles and component - [26V281000](/recalls/nhtsa/26V281000.md), 2026-05-01: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL - [25V129000](/recalls/nhtsa/25V129000.md), 2025-02-28: ELECTRICAL SYSTEM:PROPULSION SYSTEM - [2024615](/recalls/tc/2024615.md), 2024-10-18: Electrical - [2024105](/recalls/tc/2024105.md), 2024-02-16: Electrical ## Other bulletins for the same vehicles and component - [OTA\-Comm. Mod. SW. Update](/bulletins/11038222.md), 2026-10-06, Over\-the\-air update: ELECTRICAL SYSTEM. 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](/bulletins/11037806.md), 2026-10-02, Service bulletin: ELECTRICAL SYSTEM. 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](/bulletins/11037732.md), 2026-10-02, Service bulletin: ELECTRICAL SYSTEM. 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. - [LI54.10\-P\-080880](/bulletins/11036192.md), 2026-08-14, Service bulletin: ELECTRICAL SYSTEM. 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](/bulletins/11036142.md), 2026-08-12, Service bulletin: ELECTRICAL SYSTEM. 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](/bulletins/11036091.md), 2026-08-11, Service bulletin: ELECTRICAL SYSTEM. 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](/bulletins/11035230.md), 2026-07-27, Service bulletin: ELECTRICAL SYSTEM. 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](/bulletins/11035217.md), 2026-07-24, Service bulletin: ELECTRICAL SYSTEM. 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](/bulletins/11035016.md), 2026-07-14, Service bulletin: ELECTRICAL SYSTEM. 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. - [PSL\-NCU Return Parts 7/3](/bulletins/11034983.md), 2026-07-13, Other: SERVICE BRAKES; STRUCTURE:BODY; ELECTRICAL SYSTEM. Dear Mercedes\-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, July 23rd, 2026. After July 23rd, returns of these parts will no longer be accepted. These parts should be returned via ZSR Special Return, using item category SCM Authorized Part Return. Please include a copy of this NCU as your authorization to return these parts. This procedure will not affect your return allowance. All returned parts will be replaced in accordance with the chart provided below. JSON: [/v1/bulletins/11036608](/v1/bulletins/11036608) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20LI54.71-P-079104&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11036608&vehicle=Service%20bulletin%20LI54.71-P-079104)