Mercedes-Benz service campaign NCU - 2026090001
What it saysMercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the control unit software for the front signal acquisition and actuation module (SAM-F) may not correspond… NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service campaign dated Sep 11, 2026, received Oct 6, 2026, about the electrical system. It names 12 model years across Mercedes-Benz and Mercedes-Maybach (2023–2026). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
One page for every brand it was filed under. Each brand’s bulletins: Mercedes-Benz · Mercedes-Maybach.
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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, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the control unit software for the front signal acquisition and actuation module (SAM-F) may not correspond to the current series production configuration and it is possible that a communication error may occur. Remedy MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will perform a software update of the front signal acquisition and actuation module.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| NCU - 2026090001 | Service campaign | Sep 11, 2026 | 11038224 | PDF, 331 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 themMercedes-Benz 8 model years
Mercedes-Maybach 4 model years
Also filed against: 2023 Mercedes-Maybach GLS 600 4MATIC; 2024 Mercedes-Maybach GLS 600 4MATIC; 2025 Mercedes-Maybach GLS 600 4MATIC; 2026 Mercedes-Maybach GLS 600 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 8 model years this bulletin names have filed 180 complaints with NHTSA since 2015. 24 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.
Dashboard screen went black. No information available. Speed, RPM, all warning lights, turn signal lights and all information like fuel level etc. Everything total blank…happened twice and reported to MB dealership but they could not replicate the issue. Have photo of blank screen. Not aware of speed while driving or any warnings
2023 Mercedes-Benz GLE-Class · Electrical System · filed with NHTSA Sep 23, 2026 · ODI 11766441
The contact owns a 2025 Mercedes-Benz GLS450 4Matic. The contact stated that while driving at various speeds, a safety feature with a white speed limit sign started flashing on the instrument cluster. The contact stated the flashing was a constant issue. The vehicle was taken to the local dealer several times.
2025 Mercedes-Benz GLS-Class · Electrical System · filed with NHTSA Mar 3, 2026 · ODI 11721777
Car just stopped abruptly on highway. We tried to shut off and restart. Nothing worked. All emergency signs showed up on dashboard. Highway road assistance guy tried to put it in neutral..it did nit work. We were scared to death siting on i 278 with trucks,buses coming behind us. Car just abruptly stopped
2023 Mercedes-Benz GLS-Class · Electrical System · filed with NHTSA Jul 9, 2024 · ODI 11600489
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 group89 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… |
| 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… |
| ANN - MY27 XENTRY Comm. | Other | Sep 11, 2026 | A solution for the XENTRY and MY27 167 communication issue is now available through addon 26.6.1.33608. If after ensuring you've installed l… |
| 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… |
| LI82.60-P-079747 | Service bulletin | Sep 4, 2026 | Complaint The Apple Music app is no longer available in the head unit apps menu after updating the software of the… |
| 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 and Mercedes-Maybach, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mercedes-Benz NCU - 2026090001 a recall?
No. A service campaign 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 - 2026090001 repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does NCU - 2026090001 cover?
The manufacturer filed it against 12 model years across 2 brands (Mercedes-Benz and Mercedes-Maybach): 2026 Mercedes-Benz GLE-Class, 2025 Mercedes-Benz GLE-Class, 2024 Mercedes-Benz GLE-Class, 2023 Mercedes-Benz GLE-Class, 2026 Mercedes-Benz GLS-Class, 2025 Mercedes-Benz GLS-Class and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.