Mercedes-Benz bulletin NCU-2023050005
What it saysMercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2014-2020 S-Class (217 and 222 platform) vehicles, the incorrect pilot bushings may have been… NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Jun 23, 2023, received Jul 3, 2023, about the suspension. It names 8 model years (2016–2020). 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 communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2014-2020 S-Class (217 and 222 platform) vehicles, the incorrect pilot bushings may have been installed in the front axle tension struts. It is possible that noises and an increased wear of the pilot bushings may occur. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will check the pilot bushings on the front axle tension struts, and replace if necessary.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| NCU-2023050005 | Service bulletin | Jun 23, 2023 | 10238430 | PDF, 649 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 217 330 52 00 | — | — | |
| A 217 330 51 00 | — | — | |
| A 005 990 24 50 | — | — | |
| A 005 990 47 50 | — | — | |
| A 220 333 00 76 | Spacer disk | 02 | eBay Motors → |
Read by machine from the document NHTSA serves (5 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.
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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 macpherson strut for the 2020 S-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 themAlso filed against model years this site has no page for: 2018 Mercedes-Benz S 550; 2019 Mercedes-Benz S 550; 2020 Mercedes-Benz S 550.
A 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 5 model years this bulletin names have filed 101 complaints with NHTSA since 2015. 3 of them name Suspension — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
Hello as of now there was no accidents just read Reading the Recalls it is very serious I take in the vehicle to the Mercedes Benz dealership 4-29- 26 They did nothing but said they would get in contact with me once they receive the remedy
2018 Mercedes-Benz S-Class · Suspension · filed with NHTSA Apr 29, 2026 · ODI 11734474
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 group7 other manufacturer communications filed against these Mercedes-Benz models under the same component group (suspension), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| PSL-NCU Return Parts 9/18 | Other | Sep 18, 2026 | Dear Dealer Partners, The part numbers listed in the chart below should no longer be installed and any existing stock must be returned to yo… |
| 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… |
| LI35.31-P-080609 | Service bulletin | Jun 13, 2026 | Complaint Consistent popping sound from rear of vehicle. AND Rear subframe manufactured on or after November 2025. Cause Under determination… |
| LI40.10-P-061032 | Service bulletin | May 15, 2026 | Complaint Noises at the front axle when cornering or maneuvering (video files attached) Note: Save video files locally and play them with Wi… |
| LI32.35-P-079752 | Service bulletin | Feb 13, 2026 | Complaint Shock symbol in instrument cluster with "Do Not Drive Over 50MPH" message AND DTC's in A108/2 or A108/3: U013281 - Communication w… |
| LI32.50-P-079670 | Service bulletin | Sep 17, 2025 | Complaint Concern 1 - Noises in recovery mode with the vehicle stationary Concern 2 - Noises when driving in a straight line on rough terrai… |
| 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… |
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-2023050005 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-2023050005 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-2023050005 cover?
The manufacturer filed it against 8 model years: 2020 Mercedes-Benz S-Class, 2019 Mercedes-Benz S-Class, 2018 Mercedes-Benz S-Class, 2017 Mercedes-Benz S-Class, 2016 Mercedes-Benz S-Class, 2018 Mercedes-Benz S 550 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.