Mercedes-Benz SL550 engine electronic control module failure causing complete engine shutdown on Mercedes-Benz SL550

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mercedes-Benz SL550 owners report experiencing engine shutdowns due to electronic control module (ECM) failure, which can lead to a complete loss of power and functionality. Common signs of a failing ECM include the Check Engine Light illuminating, indicating potential problems with the vehicle's sensors or circuits. If the ECM malfunctions, it may disrupt engine performance and result in unexpected shutdowns while driving. Owners are advised to address ECM issues promptly to prevent further damage and ensure safety on the road. It is recommended to have the vehicle inspected by a qualified technician if ECM failure is suspected.

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