Mercedes-Benz bulletin LI83.55-P-080937
What it saysCause Internal failure of the scroll wheel within the AC compressor. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Sep 1, 2026, received Sep 9, 2026, about the visibility/wiper. It names 39 model years (2020–2027). 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 communicationCause Internal failure of the scroll wheel within the AC compressor. Remedy Check the compressor's index and part number Figure 1 against Table 1. If listed please perform the following: 1. Replace the compressor, drier, and expansion valve using the applicable WIS instructions. 2. Flush the system using the applicable WIS instructions.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI83.55-P-080937 | Service bulletin | Sep 1, 2026 | 11037243 | PDF, 29 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: 2027 Mercedes-Benz AMG E53E 4MATIC; 2027 Mercedes-Benz AMG E53E 4MATIC Wagon; 2024 Mercedes-Benz AMG S 63 E; 2026 Mercedes-Benz AMG S 63 E 4MATIC+; 2026 Mercedes-Benz E53 E 4MATIC+ ALL-Terrain.
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 34 model years this bulletin names have filed 821 complaints with NHTSA since 2015. 17 of them name Visibility/Wiper — 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 2022 Mercedes-Benz GLS450. The contact stated that while driving at an undisclosed speed, there was an abnormally loud sound coming from the roof of the vehicle. The vehicle was pulled over to the shoulder lane and the contact discovered that the sunroof glass had shattered. No warning lights were illuminated.
2022 Mercedes-Benz GLS-Class · Visibility/Wiper · filed with NHTSA Apr 16, 2026
While on the freeway, going approximately 70 mph, the vehicles onboard cameras all failed and I got a warning that said “camera dirty/unavailable/traffic sign assist currently unavailable”. Because of this failure, I almost crashed the car in Front of me. I cleaned all the cameras. The message continues to appear.
2021 Mercedes-Benz S-Class · Visibility/Wiper · filed with NHTSA Jan 18, 2025
The contact owns a 2024 Mercedes-Benz S 580-E. The contact stated that while driving 80 MPH, there was an explosive sound coming from the vehicle. There was no warning light illuminated. The contact drove to the nearest dealer where it was discovered that the sunroof had exploded without impact.
2024 Mercedes-Benz S-Class · Visibility/Wiper · filed with NHTSA May 27, 2025
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 visibility/wiper
Source: same model, same component group21 other manufacturer communications filed against these Mercedes-Benz models under the same component group (visibility/wiper), newest first. The eight newest are listed; the rest are on the Mercedes-Benz list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI83.90-P-080935 | Service bulletin | Sep 25, 2026 | Complaint CEL illuminates and/or AC does not blow cold. Cause Potentially relevance to hardware and/or software Remedy Scenario 1: 1. If the… |
| LI83.30-P-077763 | Service bulletin | Sep 2, 2026 | Complaint Customer concern of Air Conditioning not cooling. *NOTE ‑ Use of tracer DYE for leak checks is not approved. Only approved leak ch… |
| PSL-NCU Return Parts 6/19 | Other | Jun 19, 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… |
| LI82.30-P-059239 | Service bulletin | May 19, 2026 | Complaint There are several types of complaint about noises or poor windshield wiper wiping performance: A: Wiper blades squeaking, chatteri… |
| LI77.21-P-080504 | Service bulletin | May 18, 2026 | Complaint The panoramic sliding sunroof operates in a stepped movement. The panoramic roof becomes denormalized without an apparent reason… |
| LI82.30-P-078932 | Service bulletin | May 15, 2026 | Complaint Approx. A 5–10 cm wide unwiped strip remains in the area of the wiper blade attachment during the downward movement of the wiper o… |
| LI83.70-P-080411 | Service bulletin | Apr 13, 2026 | Complaint No heating output is available during electric driving operation. In conventional (combustion engine) driving operation, full heat… |
| LI72.40-P-071889 | Service bulletin | Apr 7, 2026 | Complaint When closing the door, the side window may remain slightly open (short stroke position). Automatic window raising function of side… |
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 LI83.55-P-080937 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 LI83.55-P-080937 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.
Which vehicles does LI83.55-P-080937 cover?
The manufacturer filed it against 39 model years: 2027 Mercedes-Benz E-Class, 2026 Mercedes-Benz E-Class, 2025 Mercedes-Benz E-Class, 2024 Mercedes-Benz E-Class, 2027 Mercedes-Benz G-Class, 2026 Mercedes-Benz G-Class and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.