Mercedes-Benz bulletin LI83.10-P-077934
What it saysComplaint Noise can be heard coming from the air conditioning system at higher blower motor speeds. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Jun 6, 2024, received Jul 4, 2024, about the visibility/wiper. It names 8 model years (2020–2024). 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.
Get the next Mercedes-Benz bulletin for your model 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 Noise can be heard coming from the air conditioning system at higher blower motor speeds. Cause Leaves/foreign objects have entered through the water drain grille in the water drain thereby causing an imbalance and noise in the blower wheel. Remedy Instructions for the installation of Retrofit Kit TOP598-MFA2 Bermuda foam for model series X243/X247 A2478351400 Sealing frame A2478351500 Sealing frame A2478351600 Sealing frame A2478351700 Sealing frame A2478351800 Sealing frame A2478351900 Sealing frame A2478300104 Housing cover A2478320200 Drainage fitting Steps: 1- Remove windshield wiper as per work instructions: AR82.30-P-6100MFA 2- Remove water baffle cover as per work instructions:AR83.10-P-1411MFB 3- Thoroughly clean body/body-in-white at marked positions and remove plastic cover to air inlet. Then extract air filter. 4- Attach body-in-white foam A2478351600 to cutout at body-in-white. If necessary, fix part in place with light pressure. 5- Attach foam mat A2478351400 to previously cleaned part of body-in-white. Ensure that hole of foam mat is over the hole in the body-in-white. 6- Attach sealing frame A2478351800 along edge as shown in picture. Ensure that the plastic strip is inserted flush with the offset in the previously attached foam mat. 7- Attach sealing frame A2478351700 as shown in the picture. Take care here as the strip should be attached flush to the foam strip positioned lengthwise and must run vertically on the body-in-white downward in the direction of the seam. 8- Attach sealing frame A2478351900 as shown in the picture. Ensure that the foam strip must run along the seam and must be curved outward along the running direction at the end. (As a guide, the curvature should run so that there is a space of approx. 1 cm between the foam strip and the threaded hole). Alternatively, if the corresponding foam in the right picture is present, place the sealing frame A2478351900 along the foam as shown in the picture. 9- Insert drainage fitting A2478320200. When doing so, ensure that the foam flap is aligned in the direction of the fender as shown in the picture and does not fold upward during insertion. Insert fitting with light pressure until it audibly engages. 10- Attach sealing frame A2478351500 to water baffle as in the picture and insert inlet sieve A2478300104 (see picture). 11- Insert water baffle. When doing so, ensure that sea
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI83.10-P-077934 | Service bulletin | Jun 6, 2024 | 11003208 | PDF, 49,586 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 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 one of these models
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 8 model years this bulletin names have filed 266 complaints with NHTSA since 2015. 3 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.
Driving on north bound of Merritt Parkway between exit 17 and 18. Today 12/10/25 9:28 AM My panoramic sunroof exploded ! all catch on video, driver on the vehicle behind me , came to check on me; and told me the glass went over four feet up in the air and then hit his vehicle windshield, I call Mercedes Benz customer service support to…
2021 Mercedes-Benz GLB-Class · Visibility/Wiper · filed with NHTSA Dec 10, 2025 · ODI 11704359
My 2020 Mercedes-Benz GLB has a serious, unresolved safety issue involving the hood-latch warning and windshield wipers. While I am driving, the hood-open warning appears and the windshield wipers cut in and out or shut off unexpectedly. This problem was already occurring by March 2026.
2020 Mercedes-Benz GLB-Class · Visibility/Wiper · filed with NHTSA Sep 14, 2026 · ODI 11764044
The rear liftgate glass (backlite) of the vehicle shattered spontaneously while the vehicle was parked and unoccupied inside a closed parking garage on 09/30/2026. There was no break-in, no impact, no vandalism, and no warning lamps, messages, or other symptoms prior to the failure.
2023 Mercedes-Benz EQB · Visibility/Wiper · filed with NHTSA Oct 3, 2026 · ODI 11768708
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 group8 other manufacturer communications filed against these Mercedes-Benz models under the same component group (visibility/wiper), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 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… |
| LI83.20-P-076623 | Service bulletin | May 5, 2026 | Complaint • Insufficient heating output in vehicle interior • Customer describes a one-off, loud "plopping" noise during the journey Worksho… |
| LI83.30-P-079850 | Service bulletin | Jan 16, 2026 | Complaint Customer states the AC either does not cool/has poor performance or heat is insufficient. Cause Many possible root causes Remedy *… |
| LI82.35-P-079531 | Service bulletin | Sep 3, 2025 | Complaint To prevent the wiper motor from overheating, the wipe frequency is reduced automatically when a dry windshield is detected. In spe… |
| LI83.30-P-079081 | Service bulletin | Apr 21, 2025 | Complaint Random heating of air conditioning system. Cause Temperature sensor in overhead control panel (OCP) delivering incorrect values: T… |
| LI82.35-P-078467 | Service bulletin | Oct 23, 2024 | Complaint Washer fluid system leaks Cause Various possible causes: 1. Washer fluid reservoir itself. 2. Seal on washer fluid pump/washer flu… |
| LI83.10-P-075602 | Service bulletin | Jun 6, 2024 | Complaint Noise can be heard coming from the air conditioning system at higher blower motor speeds. Cause Leaves/foreign objects have entere… |
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 LI83.10-P-077934 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 LI83.10-P-077934 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 LI83.10-P-077934 cover?
The manufacturer filed it against 8 model years: 2024 Mercedes-Benz EQB, 2023 Mercedes-Benz EQB, 2022 Mercedes-Benz EQB, 2024 Mercedes-Benz GLB-Class, 2023 Mercedes-Benz GLB-Class, 2022 Mercedes-Benz GLB-Class and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.