Mercedes-Benz bulletin LI83.30-P-077763
What it saysComplaint Customer concern of Air Conditioning not cooling. *NOTE ‑ Use of tracer DYE for leak checks is not approved. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Sep 2, 2026, received May 1, 2024, about the visibility/wiper — 16 documents under this number. It names 16 model years (2019–2027). 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.
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 communicationWhat it applies to, as the document itself states it — the build window in the manufacturer’s own words, read by machine from the PDF NHTSA serves. The build date is on the certification label in the driver’s door jamb; the dealer settles a borderline vehicle by its VIN.
Complaint Customer concern of Air Conditioning not cooling. *NOTE ‑ Use of tracer DYE for leak checks is not approved. Only approved leak check procedures as per WIS are approved. Cause Possible refrigerant leak. Remedy Perform the following measures : *Important* ‑ Photo documentation requirement is no longer in effect as of 10/1/2025. Remedy 1: Replace Evaporator (Only applies to vehicles produced PRIOR to April 15, 2022 and has NOT had the evaporator replaced previously) 1. Ensure that the rest of the AC system has been thoroughly checked for leaks with forming gas as per WIS before condemning the evaporator. 2. If no other leaks are found, replace the evaporator 3. *Important* ‑ when you get the new evaporator, check the expansion valve bracket to see if there are any bends (see attachment "Bent Bracket"). a. If bent, remove the expansion valve and bracket and check for damage to the flange (see attachment "Flange Damage"). i. If damage is found, order another evaporator and claim the part under parts warranty. The warranty claim MUST include a photo of the damage found. ii. If no damage is found, flip the bracket and torque to 7Nm. Check the evaporator for proper sealing before fully installing. b. If no bends are found, the evaporator should be installed in the vehicle. Note ‑ *If the evaporator housing has been opened or the evaporator or housing has been tampered with, the claim will be debited. Remedy 2: (Applies to all vehicles produced on or AFTER April 15, 2022 up to August 1, 2025) 1. Ensure that the entire AC system has been thoroughly checked for leaks with forming gas as per WIS . 2. If no leaks were found AND the system came in with no cooling/low charge, OR the evaporator is suspected of leaking: 3. Replace ONLY the expansion valve bracket, seals, and bolts as supplied in kit A 167 832 47 00, in accordance with the procedure outlined in WIS document AR83.30‑P‑5520ME. 4. IF THE PRODUCTION DATE IS BETWEEN JUNE 1, 2023 AND JULY 1, 2024, REPLACE THE DRYER AS WELL. (NOT THE CONDENSER) 5. After, charge the system and perform a few drive cycles. 6. Recheck the vehicle for leaks. 7. If no leaks are found, the vehicle can be released. 8. If a minor leak is detected that is less than 50ppm, then perform the following steps: • If a leak is detected, fill the system with forming gas • Close all doors and windows for 10 minutes. • Vehicle off with no bl
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI83.30-P-077763 | Service bulletin | Sep 2, 2026 | 11037736 | PDF, 47 KB |
| LI83.30-P-077763 | Service bulletin | Feb 28, 2026 | 11029092 | PDF, 43 KB |
| LI83.30-P-077763 | Service bulletin | Jan 21, 2026 | 11027783 | PDF, 44 KB |
| LI83.30-P-077763 | Service bulletin | Oct 1, 2025 | 11023929 | PDF, 42 KB |
| LI83.30-P-077763 | Service bulletin | Jul 4, 2025 | 11020279 | PDF, 2,381 KB |
| LI83.30-P-077763 | Service bulletin | May 19, 2025 | 11018510 | PDF, 1,918 KB |
| LI83.30-P-077763 | Service bulletin | May 12, 2025 | 11018322 | PDF, 41 KB |
| LI83.30-P-077763 | Service bulletin | Apr 1, 2025 | 11017022 | PDF, 41 KB |
| LI83.30-P-077763 | Service bulletin | Oct 30, 2024 | 11009550 | PDF, 41 KB |
| LI83.30-P-077763 | Service bulletin | Oct 1, 2024 | 11008882 | PDF, 41 KB |
| LI83.30-P-077763 | Service bulletin | Sep 12, 2024 | 11007857 | PDF, 41 KB |
| LI83.30-P-077763 | Service bulletin | Aug 3, 2024 | 11006550 | PDF, 39 KB |
| LI83.30-P-077763 | Service bulletin | Jun 27, 2024 | 11003094 | PDF, 41 KB |
| LI83.30-P-077763 | Service bulletin | May 25, 2024 | 11000618 | PDF, 41 KB |
| LI83.30-P-077763 | Service bulletin | May 8, 2024 | 11000597 | PDF, 40 KB |
| LI83.30-P-077763 | Service bulletin | Apr 26, 2024 | 10253711 | PDF, 35 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| A 167 832 47 00 | — | — | eBay Motors → |
Read by machine from the document NHTSA serves (10 pages), read Oct 2, 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 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 16 model years this bulletin names have filed 568 complaints with NHTSA since 2015. 12 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
The contact owns a 2021 Mercedes-Benz GLE350. The contact stated that while the vehicle was parked, there was condensation leaking from a hole near the trunk release button onto the pedal and the floor of the front passenger’s side of the vehicle. The vehicle was not diagnosed or repaired.
2021 Mercedes-Benz GLE-Class · Visibility/Wiper · filed with NHTSA Jul 2, 2025
The contact owns a 2026 Mercedes-Benz GLE350. The contact stated that while driving approximately 55 MPH, there was a thumping sound and a gush of air before the panoramic sunroof glass shattered over the passenger seat, center console, rear seat, and on the driver in the driver's seat.
2026 Mercedes-Benz GLE-Class · Visibility/Wiper · filed with NHTSA Sep 18, 2026
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 group10 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 |
|---|---|---|---|
| LI83.55-P-080937 | Service bulletin | Sep 1, 2026 | Cause Internal failure of the scroll wheel within the AC compressor. Remedy Check the compressor's index and part number Figure 1 against Ta… |
| 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… |
| 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… |
| LI83.30-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 *… |
| 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… |
| LI72.40-P-078535 | Service bulletin | Nov 1, 2024 | Complaint Automatic window raising function of side window inoperative. Cause Denormalization of the window lifter system. Remedy Update the… |
| 2024090008 | Service campaign | Sep 17, 2024 | 1. Replace left door window lifter. For basic data, see AR67.39-P-0013WEC. 2. Assemble in reverse order. |
| LI54.71-P-077938 | Service bulletin | Jun 12, 2024 | Complaint The following event codes are logged in control unit IDC213 - N62/4 (Intelligent Drive control unit): U0401FC and U0401FD. Cause U… |
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 LI83.30-P-077763 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 LI83.30-P-077763 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 LI83.30-P-077763 cover?
The manufacturer filed it against 16 model years: 2027 Mercedes-Benz GLE-Class, 2026 Mercedes-Benz GLE-Class, 2025 Mercedes-Benz GLE-Class, 2024 Mercedes-Benz GLE-Class, 2023 Mercedes-Benz GLE-Class, 2022 Mercedes-Benz GLE-Class and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone. The document itself sets the build window: built before 15 Apr 2022; built 15 Apr 2022 – 1 Aug 2025; IS: built 1 Jun 2023 – 1 Jul 2024 — the build date is on the certification label in the driver’s door jamb.