Mercedes-Benz bulletin LI27.60-P-080169
What it saysComplaint Complaints of a harsh 3to4 upshift Cause Lost torque adaptation values and negative fill times of clutch K27. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Jul 22, 2026, received Feb 11, 2026, about the power train — 2 documents under this number. It names 6 model years (2021–2026). 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.
Get the next Mercedes-Benz S-Class bulletin by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationComplaint Complaints of a harsh 3to4 upshift Cause Lost torque adaptation values and negative fill times of clutch K27. Remedy Short-term measure: Note: All steps—including resetting the learned values and performing the stationary adaptation—must be completed to resolve the concern. 1. Perform IPR and follow the provided instructions. 2. Perform software update if available (IPR will automatically check for status of software availability) 3. Perform Special Function "Resetting of learned values 'Deceleration Mode'" (VGS > Special Procedures > Special procedure > Resetting learned values Deceleration mode) 4. Complete the standstill adaptation Long-term measure: A software resolution has been released for several model years with software levels 22A.3 (n3g222aa03ub) and 22A.4 (n3g222aa04ub). - Check VGS control unit log or eeprom .txt file for "Program Status" to determine your vehicle. Software is in the approval process for MY23 with 22A.3. Once the software is released, an update on availability will be added in IPR and in this LI document. As of 6/8, software released for the following model years: MY26 with 22A.4 A001 902 25 21 >> A001 902 96 21 MY24+MY25 with 22A.3 A000 902 26 99 >> A001 902 97 21 If the vehicle software level is not 22A.3 or 22A.4: A software resolution will not be created for these vehicles, please follow the short term solution to alleviate the concern.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI27.60-P-080169 | Service bulletin | Jul 22, 2026 | 11035206 | PDF, 2,277 KB |
| LI27.60-P-080169 | Service bulletin | Feb 11, 2026 | 11028732 | PDF, 2,277 KB |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| A0019029621 | — | — | |
| A0019022521 | Released X | 1 | eBay Motors → |
| A0019029721 | — | — | |
| A0009022699 | Released X | 1 | eBay Motors → |
Read by machine from the document NHTSA serves (3 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.
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.
Email me new Mercedes-Benz bulletins for the S-Class
A weekly email, sent only in a week when Mercedes-Benz files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 6 model years this bulletin names have filed 100 complaints with NHTSA since 2015. 7 of them name Power Train — 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.
I am reporting a recurring transmission/drivability issue with my 2024 Mercedes-Benz S580. The vehicle has been experiencing a harsh, abnormal shift between approximately 3rd and 4th gear at around 25–35 mph during normal acceleration. The shift feels like a sudden jerk or hesitation and does not feel consistent with normal operation.
2024 Mercedes-Benz S-Class · Power Train · filed with NHTSA Feb 20, 2026 · ODI 11719416
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 power train
Source: same model, same component group30 other manufacturer communications filed against the Mercedes-Benz S-Class under the same component group (power train), newest first. The eight newest are listed; the rest are on the Mercedes-Benz list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI27.00-P-073124 | Service bulletin | Sep 26, 2026 | Complaint Customer complaints relating to automatic transmission 725.0 (NAG3 Classic /9G‑TRONIC automatic transmission) and 725.1… |
| LI35.31-P-080353 | Service bulletin | Sep 14, 2026 | Complaint Whining / humming noises (described as foghorn‑like) from the drivetrain in the rear axle area during cornering. (figure 1) On the… |
| LI27.10-P-075869 | Service bulletin | Sep 14, 2026 | Complaint Only vehicles with a variable transfer case are affected. This can be identified through control unit N45 or N15/7 in the quick te… |
| NCU - 2026060005 | Service campaign | Sep 11, 2026 | Issue The transmission control unit (VGS) in the automatic transmission does not comply with our currently valid specifications in the vehic… |
| LI 27.10-P-080851 | Service bulletin | Aug 29, 2026 | Complaint Intermittent shift feel or thud/clunk noise perceived, such as a brief jerk or transmission reaction during certain driving situat… |
| LI27.00-P-075630 | Service bulletin | Aug 5, 2026 | Complaint This document is intended as a pre-case diagnostic reference for transmission related concerns. It will also ensure that if a case… |
| LI27.00-P-080840 | Service bulletin | Aug 4, 2026 | Complaint Mercedes-Benz USA is currently experiencing limited availability of transmission fluid specification ATF 236.17 due to a global su… |
| LI33.30-P-080490 | Service bulletin | Aug 3, 2026 | Complaint Leakage/oil leakage at drive pinion sealing ring (input shaft) (Figures 1-2) Minor leakage/slight seepage at coupling flange nut a… |
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 LI27.60-P-080169 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 LI27.60-P-080169 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 LI27.60-P-080169 cover?
The manufacturer filed it against 6 model years: 2026 Mercedes-Benz S-Class, 2025 Mercedes-Benz S-Class, 2024 Mercedes-Benz S-Class, 2023 Mercedes-Benz S-Class, 2022 Mercedes-Benz S-Class, 2021 Mercedes-Benz S-Class. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.