Is your Mercedes ECO Start/Stop system not engaging, leaving you wondering why your fuel efficiency isn't what it should be? You're not alone! This is a common issue with many potential causes, and in this video, we're diving deep into the most frequent culprits and how you can diagnose and fix them.

We'll cover everything from simple checks to more complex diagnostics, including:

Battery Health: Why a weak or failing auxiliary battery (or even your main battery) is often the primary reason. Learn how to test your battery and what to look for.
Temperature Conditions: How engine and cabin temperatures affect the system's operation.
Sensor Malfunctions: Identifying potential issues with brake pedal sensors, temperature sensors, and more.
Electrical System Demands: Understanding how high electrical loads can prevent ECO Start/Stop from activating.
Fuses & Relays: Where to find and check crucial fuses and relays related to the system.
Software & Diagnostics: When a simple reset or a professional diagnostic scan might be necessary.
Common User Errors: Quick checks you can make before diving into deeper troubleshooting.

Don't let a non-functioning ECO Start/Stop system compromise your Mercedes' efficiency. Watch this video to learn how to identify the problem and get your system working smoothly again!

Got a different issue or a specific question? Let us know in the comments below! Don't forget to LIKE this video and SUBSCRIBE for more Mercedes-Benz maintenance and repair tips!

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