Mercedes-Benz bulletin LI46.35-P-079901
What it saysComplaint Steering force assistance unavailable after vehicle start along with several yellow warning messages and warning lamps for various driver assistance systems. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Feb 26, 2026, received Feb 28, 2026, about the steering. It names 1 model year (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 Steering force assistance unavailable after vehicle start along with several yellow warning messages and warning lamps for various driver assistance systems. Examples include but are not limited to: • Active Brake Assist • Active Lane Keeping Assist • Active Parking Assist Cause Software timing at startup. Remedy Conduct a seamless software update on the vehicle to at least MB. OS 1.3.0. Afterwards perform vehicle bus sleep (vehicle locked for at least 10 minutes and key out of range).
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI46.35-P-079901 | Service bulletin | Feb 26, 2026 | 11029084 | PDF, 34 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.
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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 1 model year this bulletin names have filed 1 complaint with NHTSA since 2015.
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 steering
Source: same model, same component group8 other manufacturer communications filed against the Mercedes-Benz CLA-Class under the same component group (steering), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI46.10-P-080896 | Service bulletin | Sep 26, 2026 | Complaint Slight creaking noises when steering. Cause Noises may come from one or more sleeves of the horn contact plate. Remedy Remove the… |
| LI46.10-P-077314 | Service bulletin | Sep 25, 2026 | Complaint Noises in the steering column area when steering. See example file in the attachments area: "MRSM‑Schleifgeräusch_SCCMGrindingNois… |
| LI46.15-P-070510 | Service bulletin | May 22, 2026 | Complaint Noises from the area of the steering column. - Creaking - Squeaking - Chattering - Humming - Grinding Cause At present, there are… |
| LI46.35-P-079982 | Service bulletin | May 21, 2026 | Complaint Fault code P063544 - The electric power steering is malfunctioning. There is an error in the data memory. Active and stored in the… |
| LI82.90-P-080159 | Service bulletin | Feb 28, 2026 | Complaint Stored DTC C220564 - "There is an internal fault in the steering angle sensor. There is an implausible signal." In the quick test… |
| LI46.35-P-075129 | Service bulletin | Jul 30, 2025 | Complaint Vibrations in steering at speeds lower than 50 km/h when turning left and right or while at a stop. May be perceived as a noise fr… |
| LI46.15-P-063353 | Service bulletin | Jun 9, 2025 | Complaint Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position… |
| LI46.10-P-077313 | Service bulletin | Jan 24, 2024 | The steering wheel generates grinding noises between the steering wheel and steering column switch module during steering maneuvers See ex… |
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 LI46.35-P-079901 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 LI46.35-P-079901 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 LI46.35-P-079901 cover?
The manufacturer filed it against 1 model year: 2026 Mercedes-Benz CLA-Class. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.