Mercedes-Benz bulletin LI91.10-P-078305
What it saysComplaint The "easy entry and exit feature" function deactivates itself after a brief period. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Mar 26, 2026, received Sep 17, 2024, about the seats — 5 documents under this number. It names 62 model years (2019–2026). 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 The "easy entry and exit feature" function deactivates itself after a brief period. (see attachment) Cause The cause is currently being investigated. Remedy Update the HU7 to the latest software version, then perform a factory reset of the HU7. Steps to perform factory reset: Navigate to Settings > System > Reset > Reset to factory settings and confirm If the problem persists, please record HU7 log and also a trace of the Body CAN (For Star 2 Body Can 1 and for Star 3 Body Can 2) during the symptom and send via a TIPS case to the Body/Chassis/Entertainment inbox. Note: Only collect and submit the log and trace if the symptom can be reliably reproduced.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI91.10-P-078305 | Service bulletin | Mar 26, 2026 | 11030295 | PDF, 192 KB |
| LI91.10-P-078305 | Service bulletin | Oct 10, 2025 | 11024276 | PDF, 192 KB |
| LI91.10-P-078305 | Service bulletin | Jul 31, 2025 | 11021153 | PDF, 192 KB |
| LI91.10-P-078305 | Service bulletin | Apr 21, 2025 | 11017127 | PDF, 190 KB |
| LI91.10-P-078305 | Service bulletin | Sep 12, 2024 | 11007858 | PDF, 190 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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
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Model years it names
Source: as the manufacturer filed themand 14 more on this site: 2020 Mercedes-Benz GLC-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, 2021 Mercedes-Benz GLE-Class, 2020 Mercedes-Benz GLE-Class, 2025 Mercedes-Benz GLS-Class, 2024 Mercedes-Benz GLS-Class, 2023 Mercedes-Benz GLS-Class, 2022 Mercedes-Benz GLS-Class, 2021 Mercedes-Benz GLS-Class, 2020 Mercedes-Benz GLS-Class.
Also filed against model years this site has no page for: 2024 Mercedes-Benz AMG C63 S E; 2024 Mercedes-Benz AMG C63 S E 4MATIC+; 2024 Mercedes-Benz Redundant AMG GLC43 4MATIC; 2025 Mercedes-Benz Redundant AMG GLC43 4MATIC; 2024 Mercedes-Benz Redundant EQE 350; 2023 Mercedes-Benz Redundant EQE 350 4MATIC; 2023 Mercedes-Benz Redundant EQS 450; 2024 Mercedes-Benz Redundant EQS 450.
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 54 model years this bulletin names have filed 1,521 complaints with NHTSA since 2015. 438 of them name Electrical System, Structure, Seats — 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.
On the 2020 Mercedes-Benz GLE-Class, the 13 owners who gave an odometer reading for Electrical System reported it at a median of 6,615 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
During regular use my 2023, Mercedes Cla 250, had a fault in the instrument display in which the display shut off completely. Only the media display remained on, however the media display is completely useless in this scenario, only the instrument display can show the speed in which the vehicle is traveling and the Rpm range in which the…
2023 Mercedes-Benz CLA-Class · Electrical System · filed with NHTSA Oct 3, 2025 · ODI 11691317
this car really has a lot of issues and honestly if I didn’t know what to do last night and didn’t know about cars, it could have seriously cost me my life but luckily I was able to move out the way of a truck that was coming fast behind me while I was at a traffic light and when the light turned green the car would not start back up…
2022 Mercedes-Benz GLB-Class · Electrical System · filed with NHTSA Aug 10, 2024 · ODI 11607732
girl went in back passenger door (rear facing car seat present), crouched under seat area to climb to middle seat when brother push button and seat moved forward without stopping crushing old head between back of seat and back of Car seat. There was no safety stop, was stuck mother has to press button to move seat back to release head
2024 Mercedes-Benz GLS-Class · Seats · filed with NHTSA Jun 9, 2026 · ODI 11743087
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 seats
Source: same model, same component group13 other manufacturer communications filed against these Mercedes-Benz models under the same component group (seats), newest first. The eight newest are listed; the rest are on the Mercedes-Benz list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI91.10-P-080683 | Service bulletin | Jun 12, 2026 | Complaint Customer reports a squeaking or creaking sound (See Example) originating from the lower front seat area. This sound may occur unde… |
| LI91.10-P-076097 | Service bulletin | May 19, 2026 | Complaint Play/noise at height adjuster or in seat guide rail on front seats Cause Tolerances and variations in the manufacturing process Re… |
| LI91.29-P-080554 | Service bulletin | May 15, 2026 | Complaint One or more seat functions are restricted or inoperative. This may include: • Seat memory • Automatic seat adjustment • Easy Entry… |
| LI91.29-P-079178 | Service bulletin | Apr 8, 2026 | Complaint After opening the driver's door, the seat can no longer be moved using the Memory button. Adjustment via the seat adjustment switc… |
| LI91.10-P-080033 | Service bulletin | Apr 8, 2026 | Complaint The seat cushion upholstery is visible when the seat cushion fore/aft adjustment (SKTV) is completely extended. Cause The stretch… |
| LI91.10-P-079346 | Service bulletin | Jul 31, 2025 | Complaint The customer complains about squeaking/creaking noises on uneven roadways, on bends or when moving in their seat. Cause Noise in t… |
| LI91.29-P-079177 | Service bulletin | Apr 21, 2025 | Complaint When opening the driver's door to aid exiting (easy entry and exit feature), only the seat adjusts. The steering wheel does not mo… |
| LI91.29-P-078588 | Service bulletin | Nov 16, 2024 | Complaint One or more of the seats in the second or third row cannot be folded over when the switch group in the trunk is used. Cause Under… |
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 LI91.10-P-078305 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 LI91.10-P-078305 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 LI91.10-P-078305 cover?
The manufacturer filed it against 62 model years: 2022 Mercedes-Benz A-Class, 2021 Mercedes-Benz A-Class, 2020 Mercedes-Benz A-Class, 2019 Mercedes-Benz A-Class, 2026 Mercedes-Benz C-Class, 2025 Mercedes-Benz C-Class and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.