Mercedes-Benz service campaign NCU-2023030016
What it saysMercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2021 GT (190 platform) vehicles, the front diffuser may not meet current production specifications. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service campaign dated May 20, 2024, received May 4, 2023, about the structure — 3 documents under this number: NCU - 2023030016 and 2 more. It names 1 model year (2021). 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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationMercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2021 GT (190 platform) vehicles, the front diffuser may not meet current production specifications. The campaign has been deactivated pending new work instructions. Approximate re-launch timeline is mid-August 2023. Once new work instructions are issued, the campaign will be reactivated and the field will be informed accordingly. Claims for repairs: RO open dates on or prior to July 20, 2023 will be accepted. If any errors occur, please open a Warranty OneTrac case for issue resolution.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| NCU - 2023030016 | Service campaign | May 20, 2024 | 11000732 | PDF, 2,905 KB |
| NCU-2023030016 | Service bulletin | Jul 20, 2023 | 10240208 | PDF, 276 KB |
| NCU-2023030016 | Service bulletin | Apr 28, 2023 | 10235677 | PDF, 1,375 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 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 1 model year this bulletin names have filed 3 complaints with NHTSA since 2015.
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 structure
Source: same model, same component group20 other manufacturer communications filed against the Mercedes-Benz AMG GT under the same component group (structure), newest first. The eight newest are listed; the rest are on the Mercedes-Benz list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI82.62-P-078631 | Service bulletin | Sep 14, 2026 | Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all rem… |
| LI72.20-P-075746 | Service bulletin | Aug 24, 2026 | Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EX… |
| PSL-NCU Return Parts 7/3 | Other | Jul 3, 2026 | Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be ret… |
| LI88.50-P-080263 | Service bulletin | Jul 1, 2026 | Complaint The trunk lid does not open or close completely and must be operated manually by the customer. The following fault codes are store… |
| LI67.30-P-078468 | Service bulletin | Jul 1, 2026 | Complaint Creaking/cracking sounds detectable in upper area of the side window panes Cause A locating rivet used during vehicle production t… |
| PSL-NCU Return Parts 6/26 | Other | Jun 26, 2026 | Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be ret… |
| NCU - 2026060002 | Service campaign | Jun 26, 2026 | Work procedure A 1. Replace longitudinal member panel at right and left. Does not apply to VIN W1KRJ4xxxxxx11347! Please send an email to yo… |
| LI88.20-P-080034 | Service bulletin | May 7, 2026 | Complaint Replacement rear lower carbon bumper cover is delivered without Parktronc (PTS) sensor holders. This is observed during part repla… |
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-2023030016 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-2023030016 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-2023030016 cover?
The manufacturer filed it against 1 model year: 2021 Mercedes-Benz AMG GT. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.