# Service bulletin LI82.20\-P\-075747

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: 10231036
- Published by NHTSA: 2023\-02\-03
- Manufacturer's number: LI82.20\-P\-075747
- Manufacturer's date: 2023\-01\-10
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Complaint The "Ambient Light Warning Assistance Inoperative" warning message is displayed in the instrument cluster and the light\-emitting diode strips are not working. This message is set by the active ambient lighting control unit \(N162/1\), when a light\-emitting diode strip is missing or where a fault is detected in the light\-emitting diode strip. Cause The following causes are possible: 1. Rework in active ambient lighting area. The ambient lighting is switched on and the connectors are disconnected from the wiring harness.NO fault code is stored. 2. Fault code 123X87 \(communication error\) is stored in the active ambient lighting control unit \(N162/1\) and an lightemitting diode strip \(E34/1\-6\) is displayed in the quick test with \! \(exclamation mark\).. 3. Fault code 186X00 \(malfunction\) stored in the light\-emitting diode strips \(E34/1\-6\). 4. Fault code 186x98 \(overtemperature\) stored in light\-emitting diode strips \(E34/1\-6\). 5. There are no fault codes stored in the active ambient lighting control unit \(N162/1\) and in the light\-emitting diode strips \(E34/1\-6\). Remedy 1. Lock and unlock vehicle to reset the active ambient lighting control unit \(N162/1\). IMPORTANT: When locking, the visual locking verification signal must be visible. Make sure that all the doors are shut. After locking, wait until the instrument cluster switches to OFF, then press unlock. 2. Run guided test as per XENTRY Diagnosis \(check electric lines and connectors\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10231036-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10231036-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2022 MERCEDES\-BENZ AMG EQS
- 2023 MERCEDES\-BENZ EQE
- 2022 MERCEDES\-BENZ EQS 450
- 2022 MERCEDES\-BENZ EQS 580
- 2023 MERCEDES\-BENZ EQS450
- 2022 MERCEDES\-BENZ S 500 4MATIC
- 2021 MERCEDES\-BENZ S 560
- 2021 MERCEDES\-BENZ S 580
- 2022 MERCEDES\-BENZ S 580 4MATIC
- 2021 MERCEDES\-MAYBACH S 560
- 2021 MERCEDES\-MAYBACH S 580
- 2022 MERCEDES\-MAYBACH S 580 4MATIC
- 2022 MERCEDES\-MAYBACH S 680 4MATIC

JSON: [/v1/bulletins/10231036](/v1/bulletins/10231036)

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