Mercedes-Benz bulletin LI27.60-P-077704
What it saysDSI selection lever module cannot be switched to park position "P" - malfunction of "P" button Note: Vehicle can still be placed into park by opening driver's door, or turning off ignition. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Oct 23, 2024, received May 1, 2024, about the power train — 4 documents under this number. It names 14 model years (2016–2024). 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 communicationDSI selection lever module cannot be switched to park position "P" - malfunction of "P" button Note: Vehicle can still be placed into park by opening driver's door, or turning off ignition. Please refer to operator's manual section, "Engaging park position P," for additional instructions. Possible causes: 1. Contamination/ingress of dust 2. Short circuit due to ingress of water Clean printed circuit board under plastic housing and button "P": 1. Remove DSI (AR27.60-P-0901FRX) 2. Remove housing of DSI (see picture 1) 3. Remove cover around "P" button above printed circuit board (see picture 2) 4. Check printed circuit board: Liquid residues and/or contamination (cf. picture 3) 5. Check "P" button: Water residues and/or contamination (cf. picture 4) 6. Carefully clean the affected areas (using contact cleaner) 7. Reassemble and check the functionality 8. If fault code still present after rework -- open TIPS Case (send to Body/Chassis/Entertainment Inbox)
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI27.60-P-077704 | Service bulletin | Oct 23, 2024 | 11009205 | PDF, 37 KB |
| LI27.60-P-077704 | Service bulletin | Jun 8, 2024 | 11003209 | PDF, 38 KB |
| LI27.60-P-077704 | Service bulletin | May 3, 2024 | 11000543 | PDF, 41 KB |
| LI27.60-P-077704 | Service bulletin | Apr 5, 2024 | 10253719 | PDF, 37 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 themAlso filed against model years this site has no page for: 2020 Mercedes-Benz AMG GT S; 2020 Mercedes-Benz AMG GT43; 2024 Mercedes-Benz AMG GT53E; 2022 Mercedes-Benz AMG GT63; 2022 Mercedes-Benz AMG GT63 S.
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 9 model years this bulletin names have filed 33 complaints with NHTSA since 2015. 8 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.
The contact owns a 2018 Mercedes-Benz AMG GT-R. The contact received notification of NHTSA campaign number: 21V478000 (Power Train) however, the part to do the recall repair was not yet available. The contact stated that while driving at an undisclosed speed, there were abnormal sounds while shifting gear.
2018 Mercedes-Benz AMG GT · Power Train · filed with NHTSA Aug 3, 2021 · ODI 11427627
The contact owns a 2016 Mercedes-Benz AMG GT. The contact received notification of NHTSA Campaign Number: 21V478000 (Power Train) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.
2016 Mercedes-Benz AMG GT · Power Train · filed with NHTSA Aug 30, 2022 · ODI 11482052
The contact owns a 2017 Mercedes-Benz AMG GT. The contact received a notification for NHTSA Campaign Number: 21V478000 (Power train) however, the part to do the recall repair was not yet available. The dealer was contacted twice and confirmed twice that parts were not yet available.
2017 Mercedes-Benz AMG GT · Power Train · filed with NHTSA Mar 1, 2022 · ODI 11454702
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 group17 other manufacturer communications filed against these Mercedes-Benz models 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… |
| 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… |
| 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… |
| LI35.30-P-058566 | Service bulletin | Jul 14, 2026 | Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once… |
| PSL-NCU Return Parts 5/22 | Other | May 22, 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… |
| LI27.60-P-080449 | Service bulletin | May 19, 2026 | Complaint Harsh upshifts, downshifts, or jolting in lower gears when accelerating. Cause Incorrectly installed (rotated) rotational speed se… |
| PSL-NCU Return Parts 5/15 | Other | May 15, 2026 | The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The de… |
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-077704 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-077704 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-077704 cover?
The manufacturer filed it against 14 model years: 2024 Mercedes-Benz AMG GT, 2023 Mercedes-Benz AMG GT, 2022 Mercedes-Benz AMG GT, 2021 Mercedes-Benz AMG GT, 2020 Mercedes-Benz AMG GT, 2019 Mercedes-Benz AMG GT and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.