Mercedes-Benz bulletin LI42.10-P-078875
What it saysComplaint Squeal from brakes at low speeds in forward and reverse. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Nov 20, 2025, received Mar 28, 2025, about the service brakes — 3 documents under this number. It names 2 model years (2024–2025). 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.
Get the next Mercedes-Benz GLC-Class bulletin by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationComplaint Squeal from brakes at low speeds in forward and reverse. Cause Frictional vibrations between brake pad and brake disc. Remedy New pads are available, A 000 421 7902. If new pads are not available, please use the below method until such time they are. Chamfer pads according to attached picture. The pads have a pre-installed adhesive on the pad backing where the pistons contact the back of the brake pad, remove this adhesive. Apply copper paste to areas according to attached picture (both where the pistons contact the backing plate and around the edges of the backing plate as shown). Follow step 3 of LI42.10-P-063502 for brake bedding procedure.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI42.10-P-078875 | Service bulletin | Nov 20, 2025 | 11025655 | PDF, 1,681 KB |
| LI42.10-P-078875 | Service bulletin | Oct 28, 2025 | 11024533 | PDF, 1,681 KB |
| LI42.10-P-078875 | Service bulletin | Mar 21, 2025 | 11016045 | PDF, 1,681 KB |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| A0019898751 | Copper Brake Paste 1 X | — | eBay Motors → |
| A0004217902 | Updated Brake Pad 1 X | — | eBay Motors → |
Read by machine from the document NHTSA serves (4 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.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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.
Email me new Mercedes-Benz bulletins for the GLC-Class
A weekly email, sent only in a week when Mercedes-Benz files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 2 model years this bulletin names have filed 79 complaints with NHTSA since 2015. 8 of them name Service Brakes — 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.
My 2025 Mercedes-Benz GLC 350e displayed a “48V battery malfunction” warning on or about July 1, 2026, while the vehicle was less than one year old. The vehicle was taken to an authorized Mercedes-Benz dealership and remained there until approximately July 20.
2025 Mercedes-Benz GLC-Class · Service Brakes · filed with NHTSA Sep 2, 2026
2. Service Department Misconduct —XXX Appointment On XXX, I brought my vehicle to the dealership’s service department for a pre-scheduled and confirmed appointment regarding a safety-related warning involving the emergency brake system.
2024 Mercedes-Benz GLC-Class · Service Brakes · filed with NHTSA Aug 26, 2026
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 service brakes
Source: same model, same component group2 other manufacturer communications filed against the Mercedes-Benz GLC-Class under the same component group (service brakes), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI42.10-P-063502 | Service bulletin | Sep 1, 2026 | Complaint Noises/ squealing from the service brake in various driving situations and ambient conditions. Cause Frictional vibrations Remedy… |
| LI42.10-P-079904 | Service bulletin | Oct 20, 2025 | Complaint At low speeds and light brake pressure, brakes will make a groaning or honking noise. Cause Frictional vibrations with very light… |
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 LI42.10-P-078875 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 LI42.10-P-078875 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.
Which vehicles does LI42.10-P-078875 cover?
The manufacturer filed it against 2 model years: 2025 Mercedes-Benz GLC-Class, 2024 Mercedes-Benz GLC-Class. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.