Mercedes-Benz service campaign NCU - 2026080001
Mercedes-Benz filed this with NHTSA as a service campaign dated Aug 15, 2026, received Sep 5, 2026, about the electrical system. It names 1 model year (2027). 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.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationIssue Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year 2027 S-Class (223 platform) vehicles, the software for the 12 V on-board electrical system safety disconnect switch control unit does not correspond to the current series configuration. It is possible that during a workshop visit, the use of an undersized charger could result in undervoltage. If the vehicle detects undervoltage three times in succession, the safety disconnect switch will be permanently locked and prevents the vehicle from starting. Remedy MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will update the software of the Safety Disconnect Switch for the 12 V On-board electrical system.
Document filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| NCU - 2026080001 | Service campaign | Aug 15, 2026 | 11037099 |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5; the full text comes from the manufacturer or a dealer. 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. Quote it 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.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mercedes-Benz NCU - 2026080001 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 - 2026080001 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 - 2026080001 cover?
The manufacturer filed it against 1 model year: 2027 Mercedes-Benz S-Class. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.