Mercedes-Benz bulletin LI54.10-P-079955
What it saysComplaint Suspension fault message: “Drive max. 50 mph” Fault code P0A7F53 - The aging limit of the high-voltage battery module has been reached. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Oct 27, 2025, received Oct 28, 2025, about the electrical system. It names 6 model years (2023–2025). 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 Suspension fault message: “Drive max. 50 mph” Fault code P0A7F53 - The aging limit of the high-voltage battery module has been reached. Cause Incorrect determination of the aging limit of the 48V battery due to a software error. If fault code P0A7F53 is set, the 48V battery irreversibly ceases to function, resulting in limited operation of the electric roll stabilization (eARS). Remedy Replacement of the 48V battery and flashing the current software for the control unit LIB48_177.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI54.10-P-079955 | Service bulletin | Oct 27, 2025 | 11024513 | 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 themAlso filed against model years this site has no page for: 2023 Mercedes-Benz AMG S 63 E 4MATIC+; 2024 Mercedes-Benz AMG S 63 E 4MATIC+.
A 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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What owners reported
Source: NHTSA complaint databaseOwners of the 4 model years this bulletin names have filed 61 complaints with NHTSA since 2015. 16 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
Car had a burning smell when entered and so stopped the car and had it towed to the dealership on 9/20/26 (Mercedes Benz of Laguna Niguel). Dealer said that a "liquid beverage were spilled onto the rear passenger seat are, resulting in liquid intrusion and a short circuit at the rear SAM control unit.
2025 Mercedes-Benz EQE · Electrical System · filed with NHTSA Sep 23, 2026 · ODI 11766383
On April 15, 2026 at approximately 1:30 PM PT, I entered my 2023 Mercedes-Benz EQE SUV 500 4MATIC (approximately 20,000 miles) in my garage. The vehicle was not plugged in or charging prior to entry. I opened the car, sat in the driver's seat, and authenticated via the fingerprint scanner.
2023 Mercedes-Benz EQE · Electrical System · filed with NHTSA Apr 16, 2026 · ODI 11731586
Electrical System malfunction with total electrical shutdown: Going in the street at about 35mph driven by a choffer and two passengers in the back seats , the right back seat passenger was using “relaxing massage”.controlled through the seat’s screen.
2025 Mercedes-Benz S-Class · Electrical System · filed with NHTSA Aug 20, 2026 · ODI 11758302
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the electrical system
Source: same model, same component group146 other manufacturer communications filed against these Mercedes-Benz models 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 |
|---|---|---|---|
| LI47.70-P-079912 | Service bulletin | Sep 29, 2026 | Complaint Vehicle will not start after DC charging Warning in the instrument cluster related to High‑voltage on board electrical system The… |
| LI54.30-P-080963 | Service bulletin | Sep 17, 2026 | Complaint Issue after OTA Update IC Odometer Reading blank("_ _ _ _") IC Maintanence data unavailable Cause OTA Update E61.0 Remedy In the I… |
| LI82.60-P-080383 | Service bulletin | Sep 15, 2026 | Complaint Radio station cover art does not refresh when switching stations. The UI continues to show the old station’s artwork instead of up… |
| LI54.71-P-079104 | Service bulletin | Sep 11, 2026 | Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious cause usually with one of the foll… |
| NCU - 2026080001 | Service campaign | Aug 15, 2026 | Issue Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year 2027 S-Class (223 platform) ve… |
| LI82.85-P-079088 | Service bulletin | Aug 14, 2026 | Complaint The following most common complaints may be observed: • Brief connectivity interruptions when using Apple CarPlay over Wi-Fi • Aud… |
| 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… |
| LI54.10-P-080880 | Service bulletin | Aug 12, 2026 | Complaint Customer Complaint: - AC charging is not possible. - The departure time, charging pause, location-based charging or target SOC lim… |
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-079955 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-079955 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-079955 cover?
The manufacturer filed it against 6 model years: 2025 Mercedes-Benz EQE, 2024 Mercedes-Benz EQE, 2023 Mercedes-Benz EQE, 2025 Mercedes-Benz S-Class, 2023 Mercedes-Benz AMG S 63 E 4MATIC+, 2024 Mercedes-Benz AMG S 63 E 4MATIC+. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.