# 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10207193-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10207193-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Equipment and accessories, Suspension

## Vehicles listed

- 2022 MERCEDES\-BENZ S 500 4MATIC
- 2022 MERCEDES\-BENZ S 580 4MATIC
- 2022 MERCEDES\-MAYBACH S 680 4MATIC

JSON: [/v1/bulletins/10207193](/v1/bulletins/10207193)

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