Mercedes-Benz bulletin LI08.20-P-077050
What it saysDiverse fault messages in the instrument cluster The fault code P061AE9 is set if the N129/2 power electronics detects an undervoltage when the vehicle is in the unlocked state. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Oct 30, 2023, received Nov 1, 2023, about the engine. It names 2 model years (2022–2023). 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 communicationDiverse fault messages in the instrument cluster The fault code P061AE9 is set if the N129/2 power electronics detects an undervoltage when the vehicle is in the unlocked state. If the pre-entry climate control starts or the ignition is switched on with the charging cable plugged in when the fault occurs, fault messages appear in the Instrument cluster. The software update for N129/2 Power electronics is available for the US market. Please perform software update on power electronics control unit N129/2. If the fault code returns after Software update, please open up a tips case.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI08.20-P-077050 | Service bulletin | Oct 30, 2023 | 10244642 | PDF, 40 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.
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What owners reported
Source: NHTSA complaint databaseOwners of the 2 model years this bulletin names have filed 118 complaints with NHTSA since 2015. 12 of them name Engine — 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.
I was informed that many cars of my make, and model have been recall they will not take into consideration the fact that it’s a safety concern for me now even though I’ve seat didn’t ask questions in regards to this car I know that this car in particular has had over 12,000 recalls for cars between 2022 and 2024 and I’ve asked the…
2023 Mercedes-Benz EQB · Engine · filed with NHTSA Mar 28, 2026 · ODI 11727710
The contact owns a 2022 Mercedes-Benz EQB 300 4MATIC. The contact stated that while driving approximately 45 MPH, there was an abnormal grinding sound coming from the rear of the vehicle, and the vehicle lost motive power. The contact stated that several unknown warnings illuminated.
2022 Mercedes-Benz EQB · Engine · filed with NHTSA Oct 1, 2025 · ODI 11690713
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 engine
Source: same model, same component group3 other manufacturer communications filed against the Mercedes-Benz EQB under the same component group (engine), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI22.10-P-079966 | Service bulletin | Oct 29, 2025 | Complaint Noise during load change when driving Cause Tolerances in front left bearing of major assembly carrier (transmission mount) A 243… |
| LI08.10-P-079423 | Service bulletin | Jun 12, 2025 | Complaint Reduced Drive Power' warning displayed on Instrument Cluster, as Illustrated in the Picture, but no relevant fault codes are prese… |
| LI20.30-P-078333 | Service bulletin | Mar 21, 2025 | Complaint A "Coolant level too low" warning message is shown in the instrument cluster. Fault code P25567B… |
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 LI08.20-P-077050 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 LI08.20-P-077050 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 LI08.20-P-077050 cover?
The manufacturer filed it against 2 model years: 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.