# Service bulletin EW \-High Voltage

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: 10253707
- Published by NHTSA: 2024\-05\-01
- Manufacturer's number: EW \-High Voltage
- Manufacturer's date: 2024\-04\-18
- NHTSA component: VISIBILITY

## NHTSA's summary

In our continuing efforts to assure the proper performance of Mercedes\-Benz products and to enhance the satisfaction of our customers, Mercedes\-Benz USA, LLC \("MBUSA"\) is extending the warranty coverage on the HV Refrigerant Compressor \& Condenser in certain Model Year \("MY"\) vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 15 years/150,000 miles, whichever occurs first, due to the following condition: The copper wire winding in the HV refrigerant compressor might corrode over time and could cause the battery management system to diagnose a lower insulation resistance leading to an insulation error. Due to the physical connection of the HV refrigerant compressor to the HV electrical system, the insulation error would trigger a fault in the entire HV electrical system. A warning message may be displayed \(e.g., battery symbol with text malfunction, without restarting engine \- visit workshop, towing prohibited see owner's manual\) in the instrument cluster. Both electric and combustion engine driving is possible. However, if the driver ignores the visit workshop without restarting a message and switches off the vehicle, it would no longer be able to start.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10253707-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10253707-9999.pdf)

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

## Components

Glass, wipers and mirrors

## Vehicles listed

- 2018 MERCEDES\-BENZ C 350 E
- 2016 to 2017 MERCEDES\-BENZ C350E
- 2018 MERCEDES\-BENZ GLC 350 E
- 2020 MERCEDES\-BENZ GLC 350 E
- 2019 MERCEDES\-BENZ GLC350E
- 2018 MERCEDES\-BENZ GLE 550 E
- 2016 to 2017 MERCEDES\-BENZ GLE550E
- 2019 to 2020 MERCEDES\-BENZ S 560 E
- 2017 MERCEDES\-BENZ S550E
- 2015 MERCEDES\-BENZ redundant S550E

JSON: [/v1/bulletins/10253707](/v1/bulletins/10253707)

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