# Service bulletin ELW\-M278Catalyst

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: 10237240
- Published by NHTSA: 2023\-06\-05
- Manufacturer's number: ELW\-M278Catalyst
- Manufacturer's date: 2023\-05\-11
- NHTSA component: ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

## NHTSA's summary

This extended warranty applies to the following condition that may necessitate the repair or replacement of the catalytic converter system and is related to: • A check engine Malfunction Indicator Lamp \(‘MIL’\) may illuminate due to sulfur contamination in the catalyst.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237240-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10237240-9999.pdf)

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

## Components

Engine, Exhaust and emissions, Catalytic converter

## Vehicles listed

- 2011 to 2014 MERCEDES\-BENZ CL550
- 2016 MERCEDES\-BENZ CLS 550
- 2018 MERCEDES\-BENZ CLS 550
- 2011 to 2015 MERCEDES\-BENZ CLS550
- 2017 MERCEDES\-BENZ CLS550
- 2012 to 2017 MERCEDES\-BENZ E550
- 2012 to 2017 MERCEDES\-BENZ S550
- 2018 to 2020 MERCEDES\-BENZ SL 550
- 2013 to 2017 MERCEDES\-BENZ SL550

JSON: [/v1/bulletins/10237240](/v1/bulletins/10237240)

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