Mercedes-Benz bulletin LI32.50-P-079670
What it saysComplaint Concern 1 - Noises in recovery mode with the vehicle stationary Concern 2 - Noises when driving in a straight line on rough terrain Concern 3 - Noises when cornering and performing alternate steering movements… NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Sep 17, 2025, received Aug 28, 2025, about the suspension — 2 documents under this number. It names 17 model years (2020–2025). 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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationComplaint Concern 1 - Noises in recovery mode with the vehicle stationary Concern 2 - Noises when driving in a straight line on rough terrain Concern 3 - Noises when cornering and performing alternate steering movements Concern 4 - Non-assignable noises Cause Concern 1 - Noises in recovery mode with the vehicle stationary Concern 2 - Noises when driving in a straight line on rough terrain. These are normal operating noises of the hydraulic high-pressure pumps. Explanation: This is the "preview noise" which is heard when recovery mode is in operation, but which can also occur when driving over very uneven ground in the Comfort and Curve drive programs. This is a normal operating noise which is caused by the hydraulic high-pressure pumps (MPE). To compensate for the unevenness of the ground, large oil flows need to be generated and to do so, the MPEs turn at very high rotational speeds. Note: In the "ECO" drive program, the "Preview" function is deactivated so these noises should not occur when driving over uneven terrain; however the vehicle body will move noticeably. Concern 3 - Noises when cornering and performing alternate steering movements - reversing noise. Repeated rapid steering out of a curve generates a "grunting" noise. Explanation: This noise is caused by the MPEs when the pump's direction of rotation is reversed. Note: The reversing noise can occur in all drive programs, but is most clearly reproducible in the Curve drive program and in Curve level 3. Carry out an evaluation firstly in Curve levels 1 to 3 (at the highest Curve level 3, the noise will also be at its loudest!), and then in the Comfort drive program. Concern 4 - Non-assignable noises. Remedy Generally check whether the same noises also occur in ECO mode - in this mode the Preview/ROAD SURFACE SCAN function is deactivated and the high-pressure pumps run at reduced speed. Consequently, it is possible to differentiate between normal operating noises and unusual noises. Regarding 1, 2: Explain the high-pressure system, replacing the suspension struts or pumps is not useful, as these noises are caused by the high-pressure pump unit and should be regarded as normal operating noises. Regarding 3: This is currently a normal operating noise and represents the series production configuration; consequently replacing the components is not useful. Regarding 4: There will certainly be other unkno
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI32.50-P-079670 | Service bulletin | Sep 17, 2025 | 11023209 | PDF, 39 KB |
| LI32.50-P-079670 | Service bulletin | Aug 28, 2025 | 11022203 | PDF, 39 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 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 17 model years this bulletin names have filed 639 complaints with NHTSA since 2015. 1 of them name Suspension — 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.
Mercedes-Benz S580 equipped with 21-inch wheels has experienced numerous tire blowouts over the course of ownership — too many to count. The blowouts occurred during normal driving on typical roads. Several blowouts caused rim damage and created a dangerous situation, including moments where I nearly lost control of the vehicle.
2022 Mercedes-Benz S-Class · Suspension · filed with NHTSA Dec 7, 2025 · ODI 11703501
While driving my 2024 Mercedes-Benz S580, I have experienced multiple serious safety issues affecting both the power train and the wheels/tires. 1.Power Train / Transmission Failure: On two separate occasions at freeway speeds, the vehicle suddenly lost all power and came to a complete stop in the middle of the lane.
2024 Mercedes-Benz S-Class · Suspension · filed with NHTSA Oct 22, 2025 · ODI 11694946
The suspension has failed despite changing engine mounts. It is available for inspection if needed. I also believe there is Premature wear of the front struts and rear shock absorbers. This can affect vehicle handling and control, increasing the risk of a crash.
2020 Mercedes-Benz GLS-Class · Suspension · filed with NHTSA Apr 1, 2025 · ODI 11652075
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 group13 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 |
|---|---|---|---|
| PSL-NCU Return Parts 9/18 | Other | Sep 18, 2026 | Dear Dealer Partners, The part numbers listed in the chart below should no longer be installed and any existing stock must be returned to yo… |
| 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… |
| LI35.31-P-080609 | Service bulletin | Jun 13, 2026 | Complaint Consistent popping sound from rear of vehicle. AND Rear subframe manufactured on or after November 2025. Cause Under determination… |
| LI32.34-P-080645 | Service bulletin | Jun 12, 2026 | Complaint Rattle or clunking noise from underneath the vehicle when driving over uneven/bumpy surfaces. Cause Internal tolerances of the ele… |
| 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… |
| LI32.35-P-079752 | Service bulletin | Feb 13, 2026 | Complaint Shock symbol in instrument cluster with "Do Not Drive Over 50MPH" message AND DTC's in A108/2 or A108/3: U013281 - Communication w… |
| LI32.35-P-079965 | Service bulletin | Feb 9, 2026 | Complaint Model Year 2019-2022 167 (GLE/GLS) - Instrument Cluster Message for Suspension "Do Not Drive Over 50MPH" with or without Illuminat… |
| LI32.25-P-079706 | Service bulletin | Jan 30, 2026 | Complaint: Clattering noise from area of hood with steel suspension. Cause: Missing helical spring shim… |
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 LI32.50-P-079670 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 LI32.50-P-079670 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 LI32.50-P-079670 cover?
The manufacturer filed it against 17 model years: 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 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.