Mercedes-Benz bulletin PSL- NCU Return Parts 4/3
What it saysThe part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a manufacturer communication dated Apr 3, 2026, received May 1, 2026, about the exterior lighting. It names 10 model years (2016–2026). A manufacturer communication 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 communicationThe part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, April 23, 2026. After April 23rd, returns of these parts will no longer be accepted. These parts should be returned via ZSR Special Return, using item category SCM Authorized Part Return. Please include a copy of this NCU as your authorization to return these parts. This procedure will not affect your return allowance. All returned parts will be replaced in accordance with the chart provided below.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PSL- NCU Return Parts 4/3 | Other | Apr 3, 2026 | 11031825 | PDF, 100 KB |
What the document itself lists
The manufacturer titles it “Notice to Return Parts DATE: April 3, 2026”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| A1679066710 | — | — | |
| A1679068512 | — | — | |
| A1679066810 | — | — | |
| A1679068612 | — | — | |
| A1679067110 | — | — | |
| A1679060113 | — | — | |
| A1679067210 | — | — | |
| A1679060213 | — | — | |
| A4637402005 | — | — | |
| A4637403801 | — | — |
Read by machine from the document NHTSA serves (1 page), 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.
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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.
Find the body for the 2018 G-Class →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.
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 10 model years this bulletin names have filed 432 complaints with NHTSA since 2015. 4 of them name Structure — 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.
1. Several times the rear hatch has opened while the car was left unattended. 2. If the hatch opens it could possibly cause a safety issue: a.By opening while driving. This has not happened and I do not know if Mercedes has a safety lock to ensure this could not happen. b.Open while parked at the store, mall, etc.
2023 Mercedes-Benz GLE-Class · Structure · filed with NHTSA Jul 5, 2023 · ODI 11530440
The panoramic sunroof exploded upwards and outwards while driving under normal conditions. It created an extremely loud and startling sound that left the driver and passenger stunned. We were fortunate there was not an immediate oncoming vehicle as we likely would have struck head on.
2022 Mercedes-Benz GLE-Class · Structure · filed with NHTSA Jul 9, 2026 · ODI 11749417
Both left and right headlamp/turn signal/marker light assemblies and control modules have been replaced. One under warranty in 2023, the second in 2025. Infotainment system displays error messages Messages may increase as assembly/control module becomes increasingly dysfunctional
2020 Mercedes-Benz GLE-Class · Exterior Lighting · filed with NHTSA Aug 26, 2025 · ODI 11683243
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 exterior lighting
Source: same model, same component group8 other manufacturer communications filed against these Mercedes-Benz models under the same component group (exterior lighting), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI82.10-P-078301 | Service bulletin | Apr 16, 2026 | Complaint Headlamp, front fog lamp leaky or fogged. Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain cl… |
| LI82.10-P-078307 | Service bulletin | Feb 25, 2026 | Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic condi… |
| LI82.10-P-078896 | Service bulletin | Feb 24, 2026 | Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic condi… |
| LI82.10-P-079179 | Service bulletin | Sep 3, 2025 | Complaint Message in instrument cluster "Adaptive high beams assistant not available/inoperative" or "DIGITAL LIGHT reduced range of functio… |
| LI54.30-P-079004 | Service bulletin | Apr 22, 2025 | Complaint The message "Device detected at diagnostics connection See Operator’s Manual" appears sporadically in the multifunction display of… |
| LI82.10-P-078069 | Service bulletin | Nov 13, 2024 | Complaint Rear lamps fogged up/not leaktight. Cause Fogging of the rear lamps is a natural phenomenon, which can occur under certain climati… |
| LI82.10-P-078302 | Service bulletin | Sep 10, 2024 | Complaint Headlamps fogged or droplets forming. Cause Due to its outlet openings, the headlamp is an "open system". This means that acidic g… |
| LI82.10-P-078304 | Service bulletin | Sep 9, 2024 | Complaint Headlamps fogged or droplets forming. Cause Due to the housing cover with pressure compensation diaphragm, the headlamps are a "cl… |
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 PSL- NCU Return Parts 4/3 a recall?
No. A manufacturer communication 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 PSL- NCU Return Parts 4/3 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 PSL- NCU Return Parts 4/3 cover?
The manufacturer filed it against 10 model years: 2018 Mercedes-Benz G-Class, 2017 Mercedes-Benz G-Class, 2016 Mercedes-Benz G-Class, 2026 Mercedes-Benz GLE-Class, 2025 Mercedes-Benz GLE-Class, 2024 Mercedes-Benz GLE-Class and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.