Service bulletin LI32.50-P-074277
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
| Type | Service bulletin |
|---|---|
| NHTSA id | 10207193 |
| Published by NHTSA | 2022-02-04 |
| Manufacturer's number | LI32.50-P-074277 |
| Manufacturer's date | 2022-01-27 |
| NHTSA component | EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT; SUSPENSION |
NHTSA's summary
Complaint 1. Noises in recovery mode with the vehicle stationary 2. Noises when driving in a straight line on rough terrain 3. Noises when cornering and performing alternate steering movements 4. Non-assignable noises Cause Complaint 1. Noises in recovery mode with the vehicle stationary Complaint 2. Noises when driving in a straight line on rough terrain Cause: These are normal operating noises of the hydraulic high-pressure pumps. 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 unknown noises that we are not yet familiar with; therefore please report these as well. For all complaints, create a PTSS case and include: 1) Informative video recordings of the noises. 2) The driving situation in the drive program in which the noises occur should be shown. 3) For comparison, also attach a recording of this same driving situation in ECO mode. 4) Additional attachments required: - Logs for control units N51/8, M67, M67/1, M67/2, M67/3 - Actual values for the pressures of the four hydraulic high-pressure pumps at standstill
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Equipment and accessories, Suspension
| MERCEDES-BENZ S 500 4MATIC | 2022 |
|---|---|
| MERCEDES-BENZ S 580 4MATIC | 2022 |
| MERCEDES-MAYBACH S 680 4MATIC | 2022 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.