# Service bulletin ELW\-ExhaustValve

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: 10241534
- Published by NHTSA: 2023\-09\-01
- Manufacturer's number: ELW\-ExhaustValve
- Manufacturer's date: 2023\-08\-03
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING

## 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 exhaust valve system 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 \(whichever occurs first\). This extended warranty applies to the condition described below that may necessitate the repair or replacement of components related to the exhaust valve assembly \(e.g. exhaust valve, cylinder head\). • The valve guide and/or seat ring may wear over time due to increased lateral forces during operation. This could potentially cause combustion misfire for cylinder 1 through 4, resulting in an activation of the check engine Malfunction Indicator Lamp \(“MIL”\). Please be advised that all repairs being claimed under this extended warranty must have a Quick Test uploaded with the following fault code information, and may be audited. • P030085 – Combustion misfire has been detected • P030x85 – Cylinder x misfire detected. \(x = the affected cylinder\) • P1CEF85 \- Injector injection quantity adjustment for cylinder balancing has almost reached the upper limit value at atleast one cylinder. • P1CE577 \- Injector injection quantity adjustment for uniform mixture formation has detected an excessively lean mixture at atleast one cylinder. All repairs found to be functioning properly or without proper documentation will be returned and the claim debited in full. Only the following damage codes and parts may be claimed for the aforementioned repairs: Damage Codes: • 01201 – Cylinder Head • 05202 – Exhaust Valve • 01205 – Valve seat ring exhaust valve • 01206 – Valve Guide Exhaust Valve

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10241534-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10241534-9999.pdf)

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

## Components

Engine, Exhaust and emissions

## Trouble codes named

P0300, P1CE5, P1CEF

## Vehicles listed

- 2019 to 2022 MERCEDES\-BENZ A 220
- 2020 to 2021 MERCEDES\-BENZ AMG A35
- 2020 MERCEDES\-BENZ AMG A45
- 2020 to 2022 MERCEDES\-BENZ AMG CLA35
- 2021 to 2022 MERCEDES\-BENZ AMG GLA35
- 2020 to 2022 MERCEDES\-BENZ AMG GLB35
- 2020 to 2022 MERCEDES\-BENZ CLA 250
- 2021 to 2022 MERCEDES\-BENZ GLA 250
- 2020 MERCEDES\-BENZ GLB 200
- 2020 to 2022 MERCEDES\-BENZ GLB 250

JSON: [/v1/bulletins/10241534](/v1/bulletins/10241534)

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