Mercedes-Benz bulletin NCU - 2025030008
Mercedes-Benz filed this with NHTSA as a emissions communication dated Mar 27, 2025, about the electrical system. It names 1 model year (2019). A emissions communication 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 communicationMercedes-Benz AG, the manufacturer of Mercedes-Benz, has determined that on certain MY 2019 A-Class (177 platform) vehicles, the engine control unit software may not correspond to the current specifications, causing the on-board diagnosis to incorrectly detect a fault in the lambda sensor that may result in the illumination of check engine malfunction indicator lamp (‘MIL’). MBUSA will conduct an Emission Service Campaign. An authorized Mercedes-Benz dealer will update the engine control unit software.
Document filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| NCU - 2025030008 | Emissions | Mar 27, 2025 | 11016040 |
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 - 2025030008 a recall?
No. A emissions communication 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 - 2025030008 repair free?
A emissions communication 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 - 2025030008 cover?
The manufacturer filed it against 1 model year: 2019 Mercedes-Benz A-Class. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.