# Service bulletin LI54.10\-P\-071499 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: 11023347 - Published by NHTSA: 2025\-09\-25 - Manufacturer's number: LI54.10\-P\-071499 - Manufacturer's date: 2025\-09\-25 - NHTSA component: ELECTRICAL SYSTEM ## NHTSA's summary Complaint The result from the XENTRY battery test does not match the current state of the battery. Cause The XENTRY battery tester uses the stored on\-board electrical system data in the SAM module to access the health of the 12 volt battery. The XENTRY battery test may not take into account a single discharge event because the SAM or EZS cannot record the data if the battery is discharged. Note: A discharged battery does not necessarily need to be replaced. A discharged battery may be recovered with no permanent damage. Remedy 1\) If the battery is discharged, charge the battery. Review WS54.00\-P\-0037B for minimum charger specifications. • Note the amperage difference between trickle \(maintainer\) chargers of at least 16A and quick chargers of at least 30A. • Review AP54.10\-P\-5449U. Note when battery is sufficiently charged the charger current is less 5A. 2\) While charging the battery, analyze the vehicle data to determine root cause of discharge using the following data points: • NOTE: For guidance on use of the on\-board electrical data please review the AKUBIS video titled "New onboard electrical system diagnosis shown on BR 166". The video can be accessed through WIS by following the path WSM\-\-\> content by model series \-\-\> passenger cars \-\-\> ML\-Class \-\-\> Model 166 \-\-\> group 54 \-\-\> New onboard electrical system diagnosis. • Refer to the March 2023 PCTT for the video walkthrough of analysis as well as the attachment of the slides to this Li. • Review GF54.10\-P\-1012A regarding what can cause deep discharge protection to not end a battery draw. • Review SI54.10\-P\-0024A for proper maintenance of the vehicle. For Star 2 vehicles: \-Review FSAM on\-board electrical data conspicuous records • NOTE: This data can be found via FSAM N10/6 \-\> Actual Values \-\> On\-board electrical system \-\> On\-board electrical system data For Star 3 vehicles: \-Review N73/3 EZS on\-board electrical data conspicuous records • NOTE: This data can be found via EZS N73/3 \-\> Actual Values \-\> On\-board electrical system \-\> On\-board electrical system data 3\) Determine if root cause is due to: • vehicle technical issue? • customer behavior? NOTE: Recommend using battery analysis sheet found in XiW \-\> Local Contents \-\> Diagnostic info \-\> Battery Discharge Worksheet 4\) If battery still does not accept charge AND the vehicle does not fall within the parameters of improper maintenance, then create a TIPS case. \*IMPORTANT\* \- If the improper maintenance/use is found during diagnosis, DO NOT open a TIPS case. If a TIPS case is opened, it will be marked 1 star and directed to your assigned FSE for review. TIPS Case must include with the case: • Amperage setting of charger and time battery was on charger • XENTRY Battery Tester results • Voltage of battery taken with multimeter: Do not connect charger while taking measurements • N10/6 FSAM, \(N73 or N73/3\) and \(N73\*1 or N73/3\*1\) • Workshop analysis of conspicuous data • Root cause analysis for battery discharge based on the above documents \(technical, customer, etc.\) • NOTE: For expedited results when creating a case write customer complaint as "XENTRY Battery Tester implausible". ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023347-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11023347-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system ## Vehicles listed - 2018 MERCEDES BENZ C 300 4MATIC - 2003 to 2009 MERCEDES BENZ G500 - 2003 to 2009 MERCEDES BENZ G55 - 2015 MERCEDES BENZ REDUNDANT C63 AMG - 2019 to 2022 MERCEDES\-BENZ A 220 - 2020 to 2021 MERCEDES\-BENZ AMG A35 - 2016 to 2024 MERCEDES\-BENZ AMG C43 - 2023 MERCEDES\-BENZ AMG C43 4MATIC - 2013 to 2021 MERCEDES\-BENZ AMG C63 - 2019 to 2023 MERCEDES\-BENZ AMG C63 S - 2024 MERCEDES\-BENZ AMG C63 S E - 2018 MERCEDES\-BENZ AMG C63S - 2020 to 2024 MERCEDES\-BENZ AMG CLA35 - 2020 to 2024 MERCEDES\-BENZ AMG CLA45 - 2024 MERCEDES\-BENZ AMG CLE53 - 2019 to 2021 MERCEDES\-BENZ AMG CLS53 - 2017 to 2018 MERCEDES\-BENZ AMG E43 - 2019 to 2023 MERCEDES\-BENZ AMG E53 - 2023 MERCEDES\-BENZ AMG E63 S - 2013 MERCEDES\-BENZ AMG E63S - 2018 to 2022 MERCEDES\-BENZ AMG E63S - 2023 to 2024 MERCEDES\-BENZ AMG EQE - 2024 to 2025 MERCEDES\-BENZ AMG EQE SUV 4MATIC - 2022 to 2024 MERCEDES\-BENZ AMG EQS - 2013 to 2025 MERCEDES\-BENZ AMG G63 - 2016 to 2018 MERCEDES\-BENZ AMG G65 - 2024 to 2025 MERCEDES\-BENZ AMG GLA 35 - 2024 MERCEDES\-BENZ AMG GLA 35 4MATIC - 2021 to 2023 MERCEDES\-BENZ AMG GLA35 - 2021 to 2023 MERCEDES\-BENZ AMG GLA45 - 2020 to 2025 MERCEDES\-BENZ AMG GLB35 - 2017 to 2024 MERCEDES\-BENZ AMG GLC43 - 2024 to 2025 MERCEDES\-BENZ AMG GLC43 4MATIC COUPE - 2018 to 2022 MERCEDES\-BENZ AMG GLC63 - 2020 to 2022 MERCEDES\-BENZ AMG GLC63 S - 2024 to 2025 MERCEDES\-BENZ AMG GLC63 S E - 2025 MERCEDES\-BENZ AMG GLC63 S E 4MATIC\+ COUPE - 2018 to 2019 MERCEDES\-BENZ AMG GLC63S - 2016 to 2019 MERCEDES\-BENZ AMG GLE43 - 2021 to 2022 MERCEDES\-BENZ AMG GLE53 - 2023 to 2025 MERCEDES\-BENZ AMG GLE53 4MATIC\+ - 2025 MERCEDES\-BENZ AMG GLE53 4MATIC\+ COUPE - 2021 to 2022 MERCEDES\-BENZ AMG GLE63 S - 2023 to 2024 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+ - 2025 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+ COUPE - 2018 MERCEDES\-BENZ AMG GLE63S - 2020 to 2022 MERCEDES\-BENZ AMG GLS63 - 2023 to 2025 MERCEDES\-BENZ AMG GLS63 4MATIC\+ - 2024 MERCEDES\-BENZ AMG GT43 - 2024 to 2025 MERCEDES\-BENZ AMG GT55 - 2024 MERCEDES\-BENZ AMG GT63 - 2026 MERCEDES\-BENZ AMG GT63 - 2024 to 2025 MERCEDES\-BENZ AMG GT63 S E - 2023 to 2025 MERCEDES\-BENZ AMG S 63 E 4MATIC\+ - 2014 to 2021 MERCEDES\-BENZ AMG S63 - 2015 to 2016 MERCEDES\-BENZ AMG S63 4MATIC - 2015 to 2020 MERCEDES\-BENZ AMG S65 - 2023 to 2024 MERCEDES\-BENZ AMG SL43 - 2022 to 2024 MERCEDES\-BENZ AMG SL55 - 2023 MERCEDES\-BENZ AMG SL55 4MATIC\+ - 2022 to 2023 MERCEDES\-BENZ AMG SL63 - 2023 MERCEDES\-BENZ AMG SL63 4MATIC\+ - 2024 to 2025 MERCEDES\-BENZ AMG SL63 S E - 2017 to 2025 MERCEDES\-BENZ C 300 - 2015 to 2016 MERCEDES\-BENZ C300 - 2020 to 2025 MERCEDES\-BENZ CLA 250 - 2026 MERCEDES\-BENZ CLA 250\+ \(EV\) - 2023 MERCEDES\-BENZ CLE 300 - 2024 MERCEDES\-BENZ CLE 300 - 2023 MERCEDES\-BENZ CLE 450 - 2024 MERCEDES\-BENZ CLE 450 - 2019 to 2021 MERCEDES\-BENZ CLS 450 - 2018 to 2019 MERCEDES\-BENZ E 300 - 2020 to 2025 MERCEDES\-BENZ E 350 - 2025 MERCEDES\-BENZ E 350 4MATIC - 2018 MERCEDES\-BENZ E 400 - 2019 to 2024 MERCEDES\-BENZ E 450 - 2025 MERCEDES\-BENZ E 450 4MATIC - 2025 MERCEDES\-BENZ E 450 4MATIC ALL\-TERRAIN - 2017 MERCEDES\-BENZ E300 - 2022 to 2024 MERCEDES\-BENZ EQB 250 - 2023 to 2025 MERCEDES\-BENZ EQB 250\+ - 2022 to 2025 MERCEDES\-BENZ EQB 300 4MATIC - 2022 to 2025 MERCEDES\-BENZ EQB 350 4MATIC - 2023 to 2025 MERCEDES\-BENZ EQE 350 4MATIC - 2023 to 2024 MERCEDES\-BENZ EQE 350\+ - 2023 to 2024 MERCEDES\-BENZ EQE 500 4MATIC - 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 - 2023 to 2024 MERCEDES\-BENZ EQS 450 4MATIC - 2022 to 2024 MERCEDES\-BENZ EQS 450\+ - 2022 to 2023 MERCEDES\-BENZ EQS 580 4MATIC - 2023 to 2025 MERCEDES\-BENZ EQS SUV 450 4MATIC - 2023 to 2025 MERCEDES\-BENZ EQS SUV 450\+ - 2023 to 2025 MERCEDES\-BENZ EQS SUV 580 4MATIC - 2025 MERCEDES\-BENZ G 550 - 2025 MERCEDES\-BENZ G 580 EV - 2010 MERCEDES\-BENZ G500 - 2010 MERCEDES\-BENZ G55 - 2021 to 2025 MERCEDES\-BENZ GLA 250 - 2024 MERCEDES\-BENZ GLA 250 4MATIC - 2020 to 2025 MERCEDES\-BENZ GLB 250 - 2018 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 - 2020 to 2021 MERCEDES\-BENZ GLC 350 E - 2025 MERCEDES\-BENZ GLC 350 E 4MATIC - 2016 to 2017 MERCEDES\-BENZ GLC300 - 2020 to 2024 MERCEDES\-BENZ GLE 350 - 2024 to 2025 MERCEDES\-BENZ GLE 350 4MATIC - 2025 MERCEDES\-BENZ GLE 450 4MATIC - 2025 MERCEDES\-BENZ GLE 450 4MATIC COUPE - 2025 MERCEDES\-BENZ GLE 450E 4MATIC - 2020 to 2021 MERCEDES\-BENZ GLE 580 - 2022 to 2024 MERCEDES\-BENZ GLE 580 4MATIC - 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 - 2021 MERCEDES\-BENZ GLS450 - 2021 MERCEDES\-BENZ GLS580 - 2024 to 2025 MERCEDES\-BENZ REDUNDANT AMG GLC43 4MATIC - 2018 to 2020 MERCEDES\-BENZ S 450 - 2021 MERCEDES\-BENZ S 500 - 2023 MERCEDES\-BENZ S 500 - 2022 to 2024 MERCEDES\-BENZ S 500 4MATIC - 2021 MERCEDES\-BENZ S 560 - 2019 to 2020 MERCEDES\-BENZ S 560 E - 2021 MERCEDES\-BENZ S 580 - 2023 MERCEDES\-BENZ S 580 - 2022 to 2024 MERCEDES\-BENZ S 580 4MATIC - 2023 to 2025 MERCEDES\-BENZ S 580 E 4MATIC - 2014 to 2017 MERCEDES\-BENZ S550 - 2016 to 2017 MERCEDES\-BENZ S550 4MATIC - 2016 MERCEDES\-BENZ S550 HYBRID - 2015 MERCEDES\-BENZ S550E - 2017 MERCEDES\-BENZ S550E - 2015 to 2017 MERCEDES\-BENZ S600 - 2017 MERCEDES\-BENZ S65 AMG - 2017 MERCEDES\-BENZ S650 - 2015 MERCEDES\-BENZ redundant S550E - 2024 to 2025 MERCEDES\-MAYBACH EQS SUV 680 4MATIC - 2021 MERCEDES\-MAYBACH GLS 600 - 2022 to 2025 MERCEDES\-MAYBACH GLS 600 4MATIC - 2021 MERCEDES\-MAYBACH S 560 - 2018 to 2020 MERCEDES\-MAYBACH S 560 4MATIC - 2021 MERCEDES\-MAYBACH S 580 - 2022 to 2024 MERCEDES\-MAYBACH S 580 4MATIC - 2018 to 2020 MERCEDES\-MAYBACH S 650 - 2023 to 2024 MERCEDES\-MAYBACH S 680 - 2022 to 2023 MERCEDES\-MAYBACH S 680 4MATIC - 2017 MERCEDES\-MAYBACH S550 - 2017 MERCEDES\-MAYBACH S600 - 2017 MERCEDES\-MAYBACH S650 ## 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. - [LI54.71\-P\-079104](/bulletins/11036608.md), 2026-09-02, 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. 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](/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. JSON: [/v1/bulletins/11023347](/v1/bulletins/11023347) [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%20LI54.10-P-071499&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11023347&vehicle=Service%20bulletin%20LI54.10-P-071499)