# Warranty extension EW\- ECU Software

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: Warranty extension
- NHTSA id: 11031616
- Published by NHTSA: 2026\-04\-28
- Manufacturer's number: EW\- ECU Software
- Manufacturer's date: 2019\-03\-13
- NHTSA component: ENGINE

## NHTSA's summary

Daimler AG \(“DAG”\), the manufacturer of Mercedes\-Benz vehicles, has determined that on the various Model Year \(“MY”\) 2014 \- 2018 Mercedes\-Benz vehicles listed below, the engine control unit \(ECU\) software may not meet current specifications. In certain circumstances when the vehicles are parked for a long duration, an erroneous activation of the “Check Engine Lamp” for the outside temperature sensor might occur. In our continuing efforts to assure the proper performance of Mercedes\-Benz products and to ensure the satisfaction of our customers, the warranty for the ECU software in the subject vehicles has been extended from the original 4 years/50,000 miles to 10 years/120,000 miles. This ECU software extended warranty is applicable to the following vehicles: In the event of an illuminated ”Check Engine Lamp” which leads to a diagnosis of a fault with the outside temperature sensor, the following fault codes may be present: Motor Electronics \(ME\) N3/10 P007128 \(for M274/276LA engine\) – Ambient Air Temperature Sensor Circuit “A’ Range/Performance signal bias level out of range/zero adjustment failure or ME N3/10 P007028 \(for M270 engine\) – Ambient Air Temperature Sensor Circuit “A’ signal bias level out of range/zero adjustment failure In this event, guided tests will be available in Xentry which will lead to the update of the engine control unit software. The following damage codes may be used: 54 575 90 Update Engine Control Unit Software. Please check the VIN in Netstar/VMI before scheduling the appointment for the repair. Applicable vehicles will display an extended warranty service package in Netstar/VMI on March 12, 2019. After the distribution of this NCU, a letter will be sent to owners of certain vehicles informing them that the warranty for the ECU software for fault codes related to the Outside Temperature Sensor will be extended from the original 4 years/50,000 miles to a total of 10 years or 120,000 miles \(whichever occurs first\). If customers have already paid to have the outside temperature sensor replaced, they may be eligible for reimbursement. Please advise the customer to follow the instructions detailed below \(also included in a copy of the customer letter\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-11031616-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-11031616-9999.pdf)

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

## Components

Engine

## Trouble codes named

P0070, P0071

## Vehicles listed

- 2018 MERCEDES BENZ C 300 4MATIC
- 2016 to 2018 MERCEDES\-BENZ AMG C43
- 2017 to 2018 MERCEDES\-BENZ AMG E43
- 2016 to 2018 MERCEDES\-BENZ AMG GLC43
- 2016 to 2018 MERCEDES\-BENZ AMG GLE43
- 2017 to 2018 MERCEDES\-BENZ AMG SLC43
- 2017 to 2018 MERCEDES\-BENZ C 300
- 2015 to 2016 MERCEDES\-BENZ C300
- 2014 to 2017 MERCEDES\-BENZ CLA250
- 2016 MERCEDES\-BENZ CLS 400
- 2015 MERCEDES\-BENZ CLS400
- 2018 MERCEDES\-BENZ E 300
- 2018 MERCEDES\-BENZ E 400
- 2018 MERCEDES\-BENZ E 400 4MATIC
- 2018 MERCEDES\-BENZ E 400 4MATIC CABRIOLET
- 2018 MERCEDES\-BENZ E 400 4MATIC COUPE
- 2018 MERCEDES\-BENZ E 400 4MATIC WAGON
- 2016 to 2017 MERCEDES\-BENZ E300
- 2015 to 2017 MERCEDES\-BENZ E350
- 2015 to 2017 MERCEDES\-BENZ E400
- 2015 MERCEDES\-BENZ E400 HYBRID
- 2015 to 2016 MERCEDES\-BENZ GLA 250
- 2018 MERCEDES\-BENZ GLC 300
- 2016 to 2017 MERCEDES\-BENZ GLC300
- 2018 MERCEDES\-BENZ GLE 400
- 2016 to 2017 MERCEDES\-BENZ GLE400
- 2016 to 2017 MERCEDES\-BENZ GLE450
- 2017 MERCEDES\-BENZ GLS450
- 2015 MERCEDES\-BENZ ML400
- 2018 MERCEDES\-BENZ SL 450
- 2015 to 2016 MERCEDES\-BENZ SL400
- 2017 MERCEDES\-BENZ SL450
- 2018 MERCEDES\-BENZ SLC 300
- 2017 MERCEDES\-BENZ SLC 43 AMG
- 2017 MERCEDES\-BENZ SLC300
- 2016 MERCEDES\-BENZ SLK300

JSON: [/v1/bulletins/11031616](/v1/bulletins/11031616)

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