# Service bulletin 2021100009

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: 10203877
- Published by NHTSA: 2021\-12\-03
- Manufacturer's number: 2021100009
- Manufacturer's date: 2021\-11\-21
- NHTSA component: ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY:THERMAL MANAGEMENT:FLUID/COOLANT

## NHTSA's summary

Check coolant line of battery cooling, replace if necessary

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203877-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203877-9999.pdf)

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

## Components

Electrical system, Hybrid and electric drive, High\-voltage battery

## Vehicles listed

- 2021 MERCEDES\-BENZ AMG GLS63
- 2021 MERCEDES\-BENZ GLS450
- 2021 MERCEDES\-BENZ GLS580
- 2021 MERCEDES\-BENZ MAYBACH GLS600
- 2021 MERCEDES\-MAYBACH GLS 600

JSON: [/v1/bulletins/10203877](/v1/bulletins/10203877)

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