Mercedes-Maybach bulletin NCU - 2024100016
Mercedes-Maybach filed this with NHTSA as a emissions communication dated Feb 28, 2026, received Feb 27, 2026, about the electrical system. It names 5 model years (2019–2021). 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 (“MBAG�), the manufacturer of Mercedes-Benz, has determined that on certain MY 2019-2021 G-Class, S-Class and GT (463, 222 & 190 platforms) vehicles, the engine control unit software does not correspond to current production specifications. It is therefore possible that onboard diagnostics and/or exhaust gas emissions requirements may not be fulfilled. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will perform the ECU software update.
Document filed under this number
| Document | Kind | Dated | NHTSA id |
|---|---|---|---|
| NCU - 2024100016 | Emissions | Feb 28, 2026 | 11029055 |
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 themAlso filed against: 2021 Mercedes-Maybach S 560; 2019 Mercedes-Maybach S 560 4MATIC; 2020 Mercedes-Maybach S 560 4MATIC; 2019 Mercedes-Maybach S 650; 2020 Mercedes-Maybach S 650.
None of these model years has a page on this site (it covers EPA-certified cars, trucks and SUVs from 2016), so the bulletin is listed here on its own.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mercedes-Maybach NCU - 2024100016 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.
Is the NCU - 2024100016 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 - 2024100016 cover?
The manufacturer filed it against 5 model years: 2021 Mercedes-Maybach S 560, 2019 Mercedes-Maybach S 560 4MATIC, 2020 Mercedes-Maybach S 560 4MATIC, 2019 Mercedes-Maybach S 650, 2020 Mercedes-Maybach S 650. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.