Mercedes-Benz bulletin LI54.10-P-080684
What it saysComplaint When disconnecting or connecting the charging connector, the charging socket flashes red and red warning messages are displayed in the instrument cluster. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Sep 17, 2026, received Aug 11, 2026, about the electrical system — 2 documents under this number. It names 2 model years (2026–2027). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationComplaint When disconnecting or connecting the charging connector, the charging socket flashes red and red warning messages are displayed in the instrument cluster. Immediately after that, neither driving nor charging is possible. Cause P292900: Contact 'Negative terminal' of contactor B in the high‑voltage battery is jammed closed If the charging cable connector is removed approximately 5 to 7 seconds after the charging process has ended, a fault is triggered. Remedy If this fault occurs, please follow these steps: 1) Wait for bus idle ‑> driving should be possible again. Note: Charging is still not possible. The fault will keep recurring as long as the fault is stored in the fault memory. 2) Plug in charging cable and check if fault (P292900 or P0AE173) is active. Clear active fault. Charging should be possible after the fault has been cleared. To prevent the fault from recurring, after the charging process has ended, wait at least 15 seconds before disconnecting the AC charging cable connector. Please create a TIPS case including quick test and HV control module log.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI54.10-P-080684 | Service bulletin | Sep 17, 2026 | 11038181 | PDF, 32 KB |
| LI54.10-P-080684 | Service bulletin | Aug 6, 2026 | 11036102 | PDF, 36 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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More bulletins about the electrical system
Source: same model, same component group39 other manufacturer communications filed against the Mercedes-Benz G-Class under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Mercedes-Benz list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| ANN - Tech. Aware. G580e | Other | Sep 21, 2026 | Tech. Awareness: G580e 465.600/465.601 - ISU For Model G580e 465.600/465.601 - Please be aware that initial start up of N147/10n1, N147/10n2… |
| LI54.21-P-080326 | Service bulletin | Sep 9, 2026 | Complaint CEL light on with no drivability concerns. Cause Signal timing error. Remedy 167, 465: SW has been released. Update the FSAM to th… |
| LI54.65-P-080132 | Service bulletin | Aug 12, 2026 | Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist… |
| LI82.85-P-079087 | Service bulletin | Aug 6, 2026 | Complaint A popup is seen on the HU with the message "data connection temporarily not available". Potentially affected functionalities in NT… |
| PSL-NCU Return Parts 7/17 | Other | Jul 17, 2026 | Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be ret… |
| LI00.20-P-077615 | Service bulletin | Jul 1, 2026 | The following symptoms may be present in the instrument cluster: 1. "Perform vehicle handover" in the workshop menu to start the maintenanc… |
| LI00.20-P-080703 | Service bulletin | Jun 12, 2026 | 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… |
| LI82.85-P-080507 | Service bulletin | May 26, 2026 | Complaint After successful commissioning of the HERMES control unit (N112/9) with XENTRY Diagnosis DVD 03/2026, the message "SOS - service n… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Mercedes-Benz, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mercedes-Benz LI54.10-P-080684 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the LI54.10-P-080684 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every Mercedes-Benz warranty extension on file lists the ones Mercedes-Benz has filed.
Which vehicles does LI54.10-P-080684 cover?
The manufacturer filed it against 2 model years: 2027 Mercedes-Benz G-Class, 2026 Mercedes-Benz G-Class. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.