Mercedes-Benz bulletin NCU - 2023110004
What it saysMercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has released a software update for certain MY 2022-2024 EQB (243 platform) vehicles that increases the robustness of the electronic drive unit… NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Nov 16, 2023, received Dec 5, 2023, about the electrical system. It names 2 model years (2022–2023). 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 communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has released a software update for certain MY 2022-2024 EQB (243 platform) vehicles that increases the robustness of the electronic drive unit (eATS), the battery management system (BMS), and DC charging (DCB). MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the Power Electronics Control Unit software – Front Axle, on the affected vehicles.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| NCU - 2023110004 | Service bulletin | Nov 16, 2023 | 10246054 | PDF, 293 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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
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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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What owners reported
Source: NHTSA complaint databaseOwners of the 2 model years this bulletin names have filed 118 complaints with NHTSA since 2015. 94 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.
The contact owns a 2022 Mercedes-Benz EQB 300 4Matic. The contact received notification of NHTSA Campaign Number: 26V073000 (Electrical System); however, the part to do the recall repair was not yet available. The contact stated that the EV battery warning light was constantly illuminated.
2022 Mercedes-Benz EQB · Electrical System · filed with NHTSA Oct 2, 2026 · ODI 11768519
Vehicle: 2023 Mercedes-Benz EQB 350 4MATIC Recall Reference: NHTSA Campaign #26V073 / High-Voltage Battery Fire Hazard My vehicle is subject to an active safety recall concerning internal high-voltage battery failure that poses a direct risk of a vehicle fire while driving or parked.
2023 Mercedes-Benz EQB · Electrical System · filed with NHTSA Oct 22, 2026 · ODI 11773027
The contact owns a 2022 Mercedes-Benz EQB 300 4MATIC. The contact stated that while his son was driving 28 MPH and depressing the accelerator pedal and making a right turn, the battery message was displayed and the vehicle decelerated.
2022 Mercedes-Benz EQB · Electrical System · filed with NHTSA Sep 22, 2026 · ODI 11766221
In depth: 2023 Mercedes-Benz EQB electrical problems →
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 group42 other manufacturer communications filed against the Mercedes-Benz EQB 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… |
| 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… |
| LI54.21-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… |
| 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… |
| LI54.10-P-080881 | Service bulletin | Aug 11, 2026 | Complaint AC and DC charging are not possible. The white LED on the charging inlet completely goes OFF after plugging in the charging cable.… |
| LI46.10-P-078012 | Service bulletin | Jul 17, 2026 | Complaint Hand detection system – malfunction / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist no… |
| 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… |
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 NCU - 2023110004 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 NCU - 2023110004 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 NCU - 2023110004 cover?
The manufacturer filed it against 2 model years: 2023 Mercedes-Benz EQB, 2022 Mercedes-Benz EQB. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.