Mercedes-Benz CL550 2011–2020 — technical service bulletin
Bulletin ELW-M278Catalyst · NHTSA communication 10237240 · issued May 11, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2011–2020
model years
32
vehicle entries
Official 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: â ¢ A check engine Malfunction Indicator Lamp (â MILâ ) may illuminate due to sulfur contamination in the catalyst.
Vehicles covered
- 2011 Mercedes-Benz CL550
- 2012 Mercedes-Benz CL550
- 2013 Mercedes-Benz CL550
- 2014 Mercedes-Benz CL550
- 2016 Mercedes-Benz CLS 550
- 2018 Mercedes-Benz CLS 550
- 2011 Mercedes-Benz CLS550
- 2012 Mercedes-Benz CLS550
- 2013 Mercedes-Benz CLS550
- 2014 Mercedes-Benz CLS550
- 2015 Mercedes-Benz CLS550
- 2017 Mercedes-Benz CLS550
- 2012 Mercedes-Benz E550
- 2013 Mercedes-Benz E550
- 2014 Mercedes-Benz E550
- 2015 Mercedes-Benz E550
- 2016 Mercedes-Benz E550
- 2017 Mercedes-Benz E550
- 2012 Mercedes-Benz S550
- 2013 Mercedes-Benz S550
- 2014 Mercedes-Benz S550
- 2015 Mercedes-Benz S550
- 2016 Mercedes-Benz S550
- 2017 Mercedes-Benz S550
- 2018 Mercedes-Benz SL 550
- 2019 Mercedes-Benz SL 550
- 2020 Mercedes-Benz SL 550
- 2013 Mercedes-Benz SL550
- 2014 Mercedes-Benz SL550
- 2015 Mercedes-Benz SL550
- 2016 Mercedes-Benz SL550
- 2017 Mercedes-Benz SL550
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.