TSB: MERCEDES BENZ CL550, CLS550, E550, S550, SL550 (2011–2020)

Bulletin ELW-M278Catalyst — May 11, 2023

Bulletin Details

Bulletin IDELW-M278Catalyst
ManufacturerMERCEDES BENZ
ModelsCL550, CLS550, E550, S550, SL550
Model Years2011–2020
Date IssuedMay 11, 2023
Date Added to NHTSAJune 5, 2023
ComponentENGINE AND ENGINE COOLING
Vehicles Affected64 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

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?? A check engine Malfunction Indicator Lamp (a??MILa??) may illuminate due to s

Affected Vehicles

MakeModelYearComponent
MERCEDES-BENZ SL550 2020 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ SL550 2020 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ SL550 2019 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ SL550 2019 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CLS550 2018 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CLS550 2018 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ SL550 2018 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ SL550 2018 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CLS550 2017 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CLS550 2017 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ E550 2017 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ E550 2017 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ S550 2017 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ S550 2017 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ SL550 2017 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ SL550 2017 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CLS550 2016 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CLS550 2016 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ E550 2016 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ E550 2016 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ S550 2016 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ S550 2016 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ SL550 2016 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ SL550 2016 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CLS550 2015 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CLS550 2015 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ E550 2015 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ E550 2015 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ S550 2015 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ S550 2015 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ SL550 2015 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ SL550 2015 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CL550 2014 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CL550 2014 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CLS550 2014 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CLS550 2014 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ E550 2014 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ E550 2014 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ S550 2014 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ S550 2014 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ SL550 2014 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ SL550 2014 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CL550 2013 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CL550 2013 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CLS550 2013 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CLS550 2013 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ E550 2013 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ E550 2013 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ S550 2013 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ S550 2013 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ SL550 2013 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ SL550 2013 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CL550 2012 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CL550 2012 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CLS550 2012 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CLS550 2012 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ E550 2012 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ E550 2012 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ S550 2012 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ S550 2012 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CL550 2011 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CL550 2011 060000 ENGINE AND ENGINE COOLING
MERCEDES-BENZ CLS550 2011 063140 ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
MERCEDES-BENZ CLS550 2011 060000 ENGINE AND ENGINE COOLING

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What Should You Do?

If your vehicle is affected by this TSB, contact your authorized MERCEDES BENZ dealer. Bring this bulletin ID (ELW-M278Catalyst) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.