Mercedes-Benz bulletin LI83.20-P-076623
What it saysComplaint Insufficient heating output in vehicle interior Customer describes a one-off, loud "plopping" noise during the journey Workshop findings: Refrigerant line between refrigerant compressor and condenser… NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated May 5, 2026, received Jul 3, 2023, about the visibility/wiper — 5 documents under this number. It names 4 model years (2022–2025). 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 communicationComplaint • Insufficient heating output in vehicle interior • Customer describes a one-off, loud "plopping" noise during the journey Workshop findings: • Refrigerant line between refrigerant compressor and condenser is cracked • If listed line is cracked, please conduct the following tests 1. Are the fault codes B19A200 or P053400 current or stored in air conditioner control unit N10*1? 2. Check dryer cartridge at condenser for particles: Remove dryer cartridge, illuminate inlet of dryer cartridge using flashlight (A), and examine filter screen through outlet of dryer cartridge (B) -> see comparison picture bad/good Further possible signs for this fault profile are: • Refrigerant level clearly too low (target: 670 g): In this case, please first of all check where a leak is present in the system • Loud noises from compressor: If loud noises are coming from the compressor, this finding must be validated with the two tests specified above (check the dryer cartridges or the specified fault codes). Loud noises alone are no reason to replace the compressor, since these can be very subjectively perceived in individual cases. Cause The refrigerant line between the A/C compressor and capacitor may be damaged due to a high refrigerant temperature. Remedy If the tests listed have been carried out and the results correspond to the described fault profile, please carry out the following steps: If the tests listed have been carried out and the results correspond to the described fault profile, please carry out the following steps: 1. Flushing of the refrigerant circuit as per AR83.30-P-1785EQA 2. Then replace the following parts: • A/C compressor (***IMPORTANT: If the A/C compressor A0008304404 or A0008307704 is installed in the vehicle, it must be replaced by part number A0008307804***) • If the capacitor A0998301100 is installed, then replace the complete capacitor (including dryer cartridge and PT sensor). • If capacitor A0998301400/1500 is installed, only new dryer cartridge (A2938350500) • Refrigerant line between refrigerant compressor and capacitor (A2438308600) 3. To use the new refrigerant line A2438308600, the electric line for pressure sensor B161/2 must be extended using the adapter wiring harness A2435408724. • Disconnect plug from pT sensor • Route the adapter line A2435408724 to the newly positioned pT sensor and secure it with a cable tie to prevent chafin
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI83.20-P-076623 | Service bulletin | May 5, 2026 | 11032364 | PDF, 5,297 KB |
| LI83.20-P-076623 | Service bulletin | Apr 20, 2026 | 11031421 | PDF, 5,297 KB |
| LI83.20-P-076623 | Service bulletin | Oct 6, 2025 | 11023937 | PDF, 7,852 KB |
| LI83.20-P-076623 | Service bulletin | Jun 17, 2025 | 11019640 | PDF, 2,708 KB |
| LI83.20-P-076623 | Service bulletin | Jun 26, 2023 | 10238415 | not found |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| A0008304404 | — | — | |
| A0008307704 | — | — | |
| A0008307804 | — | — | |
| A0998301100 | — | — | |
| A0998301400 | — | — | |
| A2938350500 | — | — | |
| A2438308600 | — | — | |
| A2435408724 | — | — |
Read by machine from the document NHTSA serves (6 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.
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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.
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What owners reported
Source: NHTSA complaint databaseOwners of the 4 model years this bulletin names have filed 134 complaints with NHTSA since 2015.
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 group5 other manufacturer communications filed against the Mercedes-Benz EQB under the same component group (visibility/wiper), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 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… |
| 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-077934 | 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… |
| 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 LI83.20-P-076623 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 LI83.20-P-076623 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 LI83.20-P-076623 cover?
The manufacturer filed it against 4 model years: 2025 Mercedes-Benz EQB, 2024 Mercedes-Benz EQB, 2023 Mercedes-Benz EQB, 2022 Mercedes-Benz EQB. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.