# Service bulletin LI54.71\-P\-078498 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: 11009036 - Published by NHTSA: 2024\-10\-22 - Manufacturer's number: LI54.71\-P\-078498 - Manufacturer's date: 2024\-10\-16 - NHTSA component: ELECTRICAL SYSTEM; WHEELS ## NHTSA's summary Complaint "Active Emergency Stop Assist Currently Unavailable" and "Active Steering Assist Inoperative" instrument cluster messages along with Tire Pressure Light on in Instrument Cluster. Cause Both systems are temporarily unavailable due to low tire pressures. An active tire pressure monitor light may result in some assistance features being temporarily unavailable until tire pressures are corrected. Remedy Check/adjust tire pressures and reset monitoring through the instrument cluster. ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11009036-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11009036-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Electrical system, Wheels ## Vehicles listed - 2002 to 2008 MERCEDES BENZ G500 - 2003 to 2004 MERCEDES BENZ G55 - 2009 MERCEDES BENZ G550 - 2023 to 2024 MERCEDES\-BENZ AMG C43 - 2024 MERCEDES\-BENZ AMG C63 S E - 2020 to 2024 MERCEDES\-BENZ AMG CLA35 - 2024 MERCEDES\-BENZ AMG CLA45 - 2024 MERCEDES\-BENZ AMG CLE53 - 2019 to 2021 MERCEDES\-BENZ AMG CLS53 - 2017 to 2018 MERCEDES\-BENZ AMG CLS63 - 2023 to 2024 MERCEDES\-BENZ AMG EQE - 2024 MERCEDES\-BENZ AMG EQE 53 4MATIC - 2024 to 2025 MERCEDES\-BENZ AMG EQE SUV 4MATIC - 2024 to 2025 MERCEDES\-BENZ AMG EQE SUV 53 4MATIC - 2022 to 2024 MERCEDES\-BENZ AMG EQS - 2022 to 2023 MERCEDES\-BENZ AMG EQS 53 - 2023 to 2024 MERCEDES\-BENZ AMG EQS 53 4MATIC - 2013 to 2018 MERCEDES\-BENZ AMG G63 - 2016 to 2018 MERCEDES\-BENZ AMG G65 - 2024 MERCEDES\-BENZ AMG GLC43 - 2016 to 2019 MERCEDES\-BENZ AMG GLE43 - 2021 to 2022 MERCEDES\-BENZ AMG GLE53 - 2023 to 2024 MERCEDES\-BENZ AMG GLE53 4MATIC\+ - 2016 to 2024 MERCEDES\-BENZ AMG GLE63 - 2021 to 2022 MERCEDES\-BENZ AMG GLE63 S - 2023 to 2024 MERCEDES\-BENZ AMG GLE63 S 4MATIC\+ - 2018 MERCEDES\-BENZ AMG GLE63S - 2016 to 2021 MERCEDES\-BENZ AMG GT - 2018 to 2021 MERCEDES\-BENZ AMG GT C - 2017 MERCEDES\-BENZ AMG GT C ROADSTER - 2018 to 2020 MERCEDES\-BENZ AMG GT R - 2018 MERCEDES\-BENZ AMG GT ROADSTER - 2016 to 2020 MERCEDES\-BENZ AMG GT S - 2017 to 2021 MERCEDES\-BENZ AMG S63 - 2015 to 2019 MERCEDES\-BENZ AMG S65 - 2023 to 2024 MERCEDES\-BENZ AMG SL43 - 2022 to 2024 MERCEDES\-BENZ AMG SL55 - 2022 to 2023 MERCEDES\-BENZ AMG SL63 - 2024 MERCEDES\-BENZ AMG SL63 S E - 2022 to 2024 MERCEDES\-BENZ C 300 - 2020 to 2024 MERCEDES\-BENZ CLA 250 - 2024 MERCEDES\-BENZ CLE 300 - 2024 MERCEDES\-BENZ CLE 450 - 2016 MERCEDES\-BENZ CLS 400 - 2019 to 2021 MERCEDES\-BENZ CLS 450 - 2016 MERCEDES\-BENZ CLS 550 - 2018 MERCEDES\-BENZ CLS 550 - 2016 MERCEDES\-BENZ CLS 63S - 2015 MERCEDES\-BENZ CLS400 - 2012 to 2015 MERCEDES\-BENZ CLS550 - 2017 MERCEDES\-BENZ CLS550 - 2012 to 2015 MERCEDES\-BENZ CLS63 - 2014 to 2015 MERCEDES\-BENZ CLS63S - 2024 MERCEDES\-BENZ E 350 - 2024 MERCEDES\-BENZ E 450 - 2024 MERCEDES\-BENZ EQE 350 4MATIC - 2023 to 2024 MERCEDES\-BENZ EQE 350\+ - 2023 to 2024 MERCEDES\-BENZ EQE 500 - 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 - 2022 to 2024 MERCEDES\-BENZ EQS 450\+ - 2022 to 2024 MERCEDES\-BENZ EQS 580 - 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 - 2010 to 2011 MERCEDES\-BENZ G550 - 2013 to 2018 MERCEDES\-BENZ G550 - 2023 to 2024 MERCEDES\-BENZ GLC 300 - 2024 MERCEDES\-BENZ GLC 300 COUPE - 2020 to 2024 MERCEDES\-BENZ GLE 350 - 2020 to 2022 MERCEDES\-BENZ GLE 350 E - 2020 to 2024 MERCEDES\-BENZ GLE 450 - 2024 MERCEDES\-BENZ GLE 450E 4MATIC - 2020 to 2021 MERCEDES\-BENZ GLE 580 - 2022 to 2024 MERCEDES\-BENZ GLE 580 4MATIC - 2016 to 2017 MERCEDES\-BENZ GLE450 - 2021 MERCEDES\-BENZ S 500 - 2023 MERCEDES\-BENZ S 500 - 2022 MERCEDES\-BENZ S 500 4MATIC - 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 MERCEDES\-BENZ S 580 4MATIC - 2024 MERCEDES\-BENZ S 580 4MATIC - 2023 MERCEDES\-BENZ S 580 E - 2024 MERCEDES\-BENZ S 580 E 4MATIC - 2015 to 2017 MERCEDES\-BENZ S550 - 2017 MERCEDES\-BENZ S63 - 2017 MERCEDES\-BENZ S65 AMG - 2024 MERCEDES\-BENZ redundant EQE 350 - 2023 MERCEDES\-BENZ redundant EQE 350 4MATIC - 2023 to 2024 MERCEDES\-BENZ redundant EQS 450 - 2024 to 2025 MERCEDES\-MAYBACH EQS SUV 680 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 - 2023 to 2024 MERCEDES\-MAYBACH S 680 - 2022 MERCEDES\-MAYBACH S 680 4MATIC - 2017 MERCEDES\-MAYBACH S550 ## Recalls for the same vehicles and component - [24V445000](/recalls/nhtsa/24V445000.md), 2024-06-14: ELECTRICAL SYSTEM:WIRING - [2024081](/recalls/tc/2024081.md), 2024-02-09: Electrical - [24V100000](/recalls/nhtsa/24V100000.md), 2024-02-09: ELECTRICAL SYSTEM:WIRING - [2022397](/recalls/tc/2022397.md), 2022-07-22: Electrical - [22V533000](/recalls/nhtsa/22V533000.md), 2022-07-22: ELECTRICAL SYSTEM:WIRING - [22V365000](/recalls/nhtsa/22V365000.md), 2022-05-20: COMMUNICATION: AUTO CRASH NOTIFICATION; ELECTRICAL SYSTEM:SOFTWARE - [21V354000](/recalls/nhtsa/21V354000.md), 2021-05-14: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; ELECTRICAL SYSTEM:SOFTWARE - [21V217000](/recalls/nhtsa/21V217000.md), 2021-03-26: ELECTRICAL SYSTEM:WIRING; ELECTRICAL SYSTEM:STARTER ASSEMBLY - [21V058000](/recalls/nhtsa/21V058000.md), 2021-02-05: ELECTRICAL SYSTEM:SOFTWARE; COMMUNICATION: AUTO CRASH NOTIFICATION - [20V800000](/recalls/nhtsa/20V800000.md), 2020-12-18: WHEELS:HUBCAP/COVER ## Other bulletins for the same vehicles and component - [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. - [LI54.65\-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. - [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. - [LI40.10\-P\-059248](/bulletins/11035214.md), 2026-07-24, Service bulletin: STRUCTURE:BODY; WHEELS. Complaint Crackling and cracking noise from the outer wheel on the front axle when cornering Cause The noise is generated by a micromovement on the contact surface between the rim and the brake disk \(wheel bolt group\) and may be intensified by potential soiling. The more lightweight rim \(AMG forged rim\) transmits the noise louder; in the case of cast rims, the noise is generally not perceptible. This is not a technical defect, but rather a complaint concerning comfort. Safe operation of the vehicle is ensured at all times. Remedy Important note: The operations described below do not represent a permanent remedy in every case. The noise may reoccur again after an indefinite period of time; sanding the rims with abrasive media multiple times is not permissible. Only cleaning using the Hazet tool 4960\-160 \(recommendation\) can be performed without any concerns each time the wheel is changed or if the complaint reoccurs. Replacing the parts \(rim, wheel bolts, wheel bearings, wheel hub, brake disk\) is not expedient in the event of this complaint. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- Clean the components of the wheel bolt connection according to the WIS instructions Sand down the rim and brake disk bowl by performing the following steps: • Manually sand rim \(old design only\) in area of water drain bores \(Figure 1; item A\), approx. 1.5 cm left and right of water drain bore \(Figure 2\) Note: Use abrasive paper with grit size 80. The grooving in this area should no longer be visible \(sand down approx. 0.1\-0.2mm\) • Also sand brake disk bowl using emery cloth or abrasive paper with a grain size of 120 • For vehicles equipped with the AMG ceramic brake system \(B07\), abrasive paper may not be used for cleaning on the brake disk side Note: Do not use any cleaning agent when cleaning on the rim side. Cleaning using abrasive paper with a grain size of 80 will suffice. Do not apply any grease, lubricant or paste after cleaning The brake disk bowl should be "bare metal" in the area of the imprints made by the hole \(Figure 3\) - [LI46.10\-P\-078012](/bulletins/11035120.md), 2026-07-21, Service bulletin: STEERING; ELECTRICAL SYSTEM. Complaint Hand detection system – malfunction / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" "Active steering assist not available" Cause Possible causes: Hand detection mat, hand detection control unit, contacts, and electrical feed line. Remedy In the event of a customer complaint and fault code in IDC control unit: U186B29 in IDC223 or fault code U0429E0, U042941, U042929, U042902, U0429E1 in IDC213 or fault code in HOSWD control unit: B1E7614 Check: Please do not replace the HOSWD control unit. Please flash the new SW and perform the SCN coding for the HOSWD control unit \(N179/1\) \(available from July 2026\). The software can be flashed onto all HOSWD213 with HW number A0009011522 and all HOSWD223 with HW number A0009011422. Please also flash the SW for the IDC control unit \(N62/4\), if possible \(only applies to HOSWD223\). Erase fault memory Remedy: Turn on the ignition or start the engine without touching the steering wheel. If, after 10 seconds without touching the steering wheel, one of the three fault messages appears on the instrument cluster: Check the contacts and feed lines in the steering wheel by means of a visual inspection for damage, crimp connections, loose connections, etc. \(example in picture 2 and 3\). If there is visible damage \-\> replace the steering wheel electronics or the feed lines. If there is not any visible damage \-\> replace the steering wheel rim. If a yellow message does not appear on the instrument cluster within 10 seconds: Grasp the steering wheel fully with both hands, including the chrome molding at the 6 o'clock position \(see picture 1\). If the fault is triggered by grasping the steering wheel rim or pressing the clip at the 6 o'clock position, check the contacts and feed lines in the steering wheel by means of a visual inspection for damage, kinked connections, loose connections, etc. \(example in picture 2 and 3\). Check the ground connections \(screw connections and cables to the steering wheel rim\); if necessary, retighten the screws/bolts and check for corrosion \(picture 4\). If there is visible damage \-\> replace the steering wheel electronics or the feed lines. If there is not any visible damage: Replace the steering wheel rim. Please do not replace the HOSWD control unit. A TIPS case should be created if fault profile is unclear. In the event of a customer complaint and a further fault code in HOSWD: B1E7713: Check the ground connections \(screw connections and cables to the steering wheel rim\); if necessary, retighten the screws/bolts and check for corrosion \(picture 4\). B1F1F04: Check the control unit of the hand detection system; if necessary, replace this with the control unit from a donor vehicle \(make sure that the hardware part numbers are identical\). - [LI00.20\-P\-077615](/bulletins/11034538.md), 2026-07-06, Service bulletin: ELECTRICAL SYSTEM. Complaint 1. "Perform vehicle handover" in the workshop menu to start the maintenance computer for service A/B cannot be carried out. 2. Service confirmation is not possible because "Perform vehicle handover" is displayed. This cannot be carried out. 3. The service display in the instrument cluster permanently displays 365 days \(remaining time\) and does not change. Cause Routine change in the software in N133/1 \(instrument cluster\) or A26/17 \(MBUX multimedia system and instrument cluster \(head unit\)\). Vehicle handover was not performed. Remedy For model series 290 AMG up to and including AEJ 22 and model series 167 up to and including AEJ 21/2, the following applies: Manually commission already\-installed instrument cluster control unit N133/1 and then perform special procedure to re\-initialize ASSYST data in N127 powertrain control unit. The following applies to model series 167 from AEJ 22/1 onward, 192 AMG, 206, 214, 223, 232 AMG, 236, 254, 290 AMG from AEJ 23 onward, 294, 295, 296, 297 and 465: Reinitialize ASSYST Plus under Adaptations – Teach\-in processes – ASSYST PLUS in control unit N133/1 \(instrument cluster\) or A26/17 \(MBUX multimedia system and instrument cluster \(head unit\)\), and then perform the special procedure for reinitializing the ASSYST data in powertrain control unit N127. - [LI54.21\-P\-080326](/bulletins/11034506.md), 2026-07-06, Service bulletin: ELECTRICAL SYSTEM; ENGINE. Complaint CEL light on with no drivability concerns. Cause Signal timing error. Remedy 167: SW has been released. Update the FSAM to the latest SW version. 465, 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. - [LI00.20\-P\-080703](/bulletins/11033855.md), 2026-06-16, Service bulletin: ELECTRICAL SYSTEM. Complaint Service code B1 displayed in the customer menu does not match the workshop code displayed in the workshop menu, e.g., 505 or 550A, which includes a service A. Cause The root cause is currently being investigated. Remedy To determine the cause, the instrument cluster control unit \(N133/1\) and powertrain control unit \(N127\) logs are required before confirming the service or correction using XENTRY Diagnosis. Please open a TIPS case to BCE inbox with the requested information in the attachments. - [LI00.20\-P\-077615](/bulletins/11033852.md), 2026-06-16, Service bulletin: ELECTRICAL SYSTEM. Complaint 1. "Perform vehicle handover" in the workshop menu to start the maintenance computer for service A/B cannot be carried out. 2. Service confirmation is not possible because "Perform vehicle handover" is displayed. This cannot be carried out. 3. The service display in the instrument cluster permanently displays 365 days \(remaining time\) and does not change. Cause Routine change in the software in N133/1 \(instrument cluster\) or A26/17 \(MBUX multimedia system and instrument cluster \(head unit\)\). Vehicle handover was not performed. Remedy For model series 290 AMG up to and including AEJ 22 and model series 167 up to and including AEJ 21/2, the following applies: Manually commission already\-installed instrument cluster control unit N133/1 and then perform special procedure to re\-initialize ASSYST data in N127 powertrain control unit. For model series 167 as of AEJ 22/1, 192 AMG, 206, 214, 232 AMG, 236, 254, 290 AMG as of AEJ 23, 294, 295, 296, 297 and 465, the following applies: Reinitialize ASSYST Plus under Adaptations – Teach\-in processes – ASSYST PLUS in control unit N133/1 \(instrument cluster\) or A26/17 \(MBUX multimedia system and instrument cluster \(head unit\)\), and then perform the special procedure for reinitializing the ASSYST data in powertrain control unit N127. - [LI82.85\-P\-080507](/bulletins/11033185.md), 2026-06-02, Service bulletin: ELECTRICAL SYSTEM. Complaint After successful commissioning of the HERMES control unit \(N112/9\) with XENTRY Diagnosis DVD 03/2026, the message "SOS \- service not activated" appears on the instrument cluster. In addition, the following two conditions are also met: • HERMES \(N112/9\) control unit: event code B15CE00 is ACTIVE and STORED \(A\+S\) • Vehicle Documentation System: For the HERMES control unit, the EID1, EID2, ICCID, IMEI, IMSI, TELNR fields in the "Identification/Serial number" column have the value "\-" Cause Still under analysis Remedy Recommission the HERMES control unit \(N112/9\) with XENTRY Diagnosis 03/2026 and add\-on 33399 installed or carry out the procedure with a newer version of XENTRY Diagnosis: XENTRY→ "N112/9 \- Control unit for telematics services \(HERMES\)" \-\> "Adaptations" \-\> "Control unit commissioning" \-\> "Commissioning of previously installed control unit" JSON: [/v1/bulletins/11009036](/v1/bulletins/11009036) [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-078498&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11009036&vehicle=Service%20bulletin%20LI54.71-P-078498)