NHTSA MB Service Campaign 2019040001 PDF

A service bulletin outlining a campaign to update the engine electronic control unit (ECU) software for various Mercedes-Benz models from model years 2012-2014. The document addresses an issue where the engine software may not meet specifications, potentially causing a malfunction indicator light without an actual fault. The bulletin specifies that the update will be conducted by authorized dealers and does not require parts as the repair involves only a software update.