Mercedes-Benz bulletin LI35.10-P-078931
What it saysComplaint Potential corrosion on the rear axle carrier Cause Due to market-specific conditions such as moisture, ingress of dirt and/or environmental influences, corrosion can occur on the rear axle carrier Remedy… NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated May 13, 2026, received Apr 24, 2025, about the suspension — 2 documents under this number. It names 8 model years (2016–2020). 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 Potential corrosion on the rear axle carrier Cause Due to market-specific conditions such as moisture, ingress of dirt and/or environmental influences, corrosion can occur on the rear axle carrier Remedy In the event of a complaint, the optimized repair method must be used when replacing the rear axle carrier. The repair method for the respective model series can be found in the attachment. Repair packages are available in Xentry Repair Packages for the special processing of rear axle carriers Note: Please utilize flexible wand (319-SAT1058826) along with the Cavity Preservation Gun (W 000 588 03 72 00) for cavity wax application to improve coverage and reduces labor efforts. The flexible wand may be obtained through the Mercedes-Benz Standard Service Equipment Program website.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI35.10-P-078931 | Service bulletin | May 13, 2026 | 11032684 | PDF, 49 KB |
| LI35.10-P-078931 | Service bulletin | Apr 21, 2025 | 11017211 | PDF, 37 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 themAlso filed against model years this site has no page for: 2017 Mercedes-Benz SLK 350.
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 7 model years this bulletin names have filed 98 complaints 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 suspension
Source: same model, same component group9 other manufacturer communications filed against these Mercedes-Benz models under the same component group (suspension), newest first. The eight newest are listed; the rest are on the Mercedes-Benz list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI33.20-P-078406 | Service bulletin | Jul 8, 2026 | Complaint Creaking noise, in irregular sequence when driving slowly in combination with slight steering movements and/or Creaking/crackling… |
| LI40.10-P-061032 | Service bulletin | May 15, 2026 | Complaint Noises at the front axle when cornering or maneuvering (video files attached) Note: Save video files locally and play them with Wi… |
| LI32.25-P-079706 | Service bulletin | Jan 30, 2026 | Complaint: Clattering noise from area of hood with steel suspension. Cause: Missing helical spring shim… |
| LI46.80-P-080054 | Service bulletin | Dec 6, 2025 | Complaint An instrument cluster message "Rear axle steering fault, stop immediately" is very briefly illuminated in the instrument cluster u… |
| LI32.25-P-079707 | Service bulletin | Oct 27, 2025 | Complaint Wheezing noises/squeaking noises from the front shock absorbers when passing over surface undulations and rough road. Noise MUST m… |
| LI32.25-P-079708 | Service bulletin | Sep 4, 2025 | Complaint Metallic clattering/noise from the area of the dashboard on uneven roads Cause A loose upper metal plate in the head bearing… |
| LI32.30-P-079405 | Service bulletin | Jul 11, 2025 | Complaint Vehicle lifts and lowers again while driving. Cause Moisture may collect in the compressor of the air suspension over its lifetime… |
| LI46.35-P-076566 | Service bulletin | Mar 10, 2025 | Complaint A squeaking noise comes from the electric power steering; see video with example. Cause Toothed rack in the area of the screw driv… |
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 LI35.10-P-078931 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 LI35.10-P-078931 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 LI35.10-P-078931 cover?
The manufacturer filed it against 8 model years: 2016 Mercedes-Benz E-Class, 2020 Mercedes-Benz SLC-Class, 2019 Mercedes-Benz SLC-Class, 2018 Mercedes-Benz SLC-Class, 2017 Mercedes-Benz SLC-Class, 2016 Mercedes-Benz SLC-Class and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.