Mercedes-Benz bulletin NCU-2023060008
What it saysMercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2023 C-Class (206 platform) vehicles, the adhesive seam on the cross-member in the rear area does… NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Jun 30, 2023, received Jul 3, 2023, about the suspension. It names 2 model years (2023). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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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 Model Year (“MY”) 2023 C-Class (206 platform) vehicles, the adhesive seam on the cross-member in the rear area does not correspond to current specifications. As a result, noise may occur in the rear area of the vehicle while driving and the body may be subjected to greater stress in this area.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| NCU-2023060008 | Service bulletin | Jun 30, 2023 | 10238429 | PDF, 738 KB |
What the document itself lists
The manufacturer titles it “Service Campaign Launch Notification”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| A 004 990 17 97 | in positions | — | eBay Motors → |
| A 004 990 16 97 | in positions | — | eBay Motors → |
Read by machine from the document NHTSA serves (6 pages), read Sep 30, 2026. A part number is shown only where it matches Mercedes-Benz’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the non-powered axle assembly for the 2023 C-Class →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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 2 model years this bulletin names have filed 90 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 suspension
Source: same model, same component group8 other manufacturer communications filed against these Mercedes-Benz models under the same component group (suspension), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI33.20-P-078406 | Service bulletin | Jul 8, 2026 | Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling… |
| LI32.25-P-079706 | Service bulletin | Jan 30, 2026 | Complaint: Clattering noise from area of hood with steel suspension. Cause: Missing helical spring shim… |
| LI46.80-P-080054 | Service bulletin | Dec 6, 2025 | Complaint An instrument cluster message "Rear axle steering fault, stop immediately" is very briefly illuminated in the instrument cluster u… |
| LI42.15-P-079899 | Service bulletin | Oct 28, 2025 | Complaint Brake squeal on the front axle at slow speed and before coming to a stop. Cause Frictional vibrations Remedy Install new brake lin… |
| LI32.25-P-079707 | Service bulletin | Oct 27, 2025 | Complaint Wheezing noises/squeaking noises from the front shock absorbers when passing over surface undulations and rough road. Noise MUST m… |
| LI32.25-P-079708 | Service bulletin | Sep 4, 2025 | Complaint Metallic clattering/noise from the area of the dashboard on uneven roads Cause A loose upper metal plate in the head bearing… |
| LI46.35-P-076566 | Service bulletin | Mar 10, 2025 | Complaint A squeaking noise comes from the electric power steering; see video with example. Cause Toothed rack in the area of the screw driv… |
| LI32.25-P-076956 | Service bulletin | Oct 12, 2023 | Wheezing noises from the front shock absorbers when passing over surface undulations and rough road. The noises may become more conspicuous… |
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-2023060008 a recall?
No. A service bulletin 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-2023060008 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every Mercedes-Benz warranty extension on file lists the ones Mercedes-Benz has filed.
Which vehicles does NCU-2023060008 cover?
The manufacturer filed it against 2 model years: 2023 Mercedes-Benz C-Class, 2023 Mercedes-Benz GLC-Class. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.