The ECO Start/Stop function in Mercedes-AMG vehicles is a feature designed to improve fuel efficiency by automatically shutting off the engine when the vehicle is idling (such as at a traffic light or in stop-and-go traffic) and restarting it when the accelerator is pressed. This system helps reduce fuel consumption and lower emissions. However, some drivers may prefer to turn the system off for various reasons, such as performance needs or personal preference. Here's how to switch the ECO Start/Stop function on or off in a Mercedes-AMG vehicle:

1. Switching the ECO Start/Stop Function On/Off via the Button:

In most Mercedes-AMG vehicles, the ECO Start/Stop function can be controlled using a dedicated button on the dashboard or center console. The button typically features an "A" in a circle with an arrow or a symbol that resembles a car engine turning off and on.

• To turn off the ECO Start/Stop system:
  1. Look for the ECO button near the center console, often next to the gear shift lever or in the lower part of the dashboard.
  2. Press the ECO button to deactivate the ECO Start/Stop function.
  3. The button should illuminate to indicate that the system is turned off.
  4. The engine will no longer turn off when the vehicle is idling.
• To turn on the ECO Start/Stop system:
  1. Simply press the ECO button again.
  2. The light on the button should turn off, indicating that the system is now activated.
  3. The engine will restart automatically when the vehicle is stopped and will shut off again when the vehicle comes to a complete stop.

2. ECO Start/Stop and Driving Mode:

In some Mercedes-AMG models, the ECO Start/Stop function behavior may change based on the selected driving mode. For example:

• Comfort Mode: In comfort-oriented driving modes, the ECO Start/Stop function is typically activated by default to prioritize fuel efficiency.
• Sport and AMG Modes: When in Sport, Sport+, or other performance modes, the system may be automatically disabled to provide a more dynamic driving experience. In these modes, the engine remains running at all times to ensure better throttle response and performance.

If the system is not automatically disabled in a specific driving mode, you can manually turn it off using the ECO button as described above.

3. Using the Vehicle’s Infotainment System (if applicable):

In some newer Mercedes-AMG models, the ECO Start/Stop function can also be controlled via the MBUX infotainment system:

1. Access the Vehicle Settings menu through the MBUX display.
2. Find the Eco Start/Stop function option under the settings related to Comfort or Driving Assistance.
3. Toggle the setting to turn the system on or off according to your preference.

4. Reasons to Turn the ECO Start/Stop Function Off:

• Improved Driving Dynamics: Turning off the ECO Start/Stop system ensures the engine remains on at all times, which is preferred for performance-focused driving, such as aggressive acceleration or spirited driving on twisty roads.
• Battery and Climate Control: If the ECO Start/Stop function is active, the engine will stop, which could interfere with the operation of other systems like air conditioning or heating. Some drivers may prefer to keep the engine running to maintain these systems, especially during long periods of idling in extreme weather conditions.
• Avoiding Frequent Start-Stop Cycles: In certain driving conditions, like short trips or frequent stop-and-go traffic, the engine might be turned off and on very often, which some drivers find annoying or distracting.

5. Reasons to Keep the ECO Start/Stop Function On:

• Fuel Efficiency: The ECO Start/Stop function helps to optimize fuel consumption by reducing idling times. This feature is ideal for urban environments where you stop at traffic lights or experience frequent congestion.
• Environmental Impact: By minimizing engine idle time, this feature helps reduce emissions and contribute to a more environmentally friendly driving experience.
• Smoother Idle Transitions: In many cases, the transition from engine off to engine on is quite smooth, especially with modern Mercedes-Benz technologies, allowing for seamless driving without noticeable disruptions.

6. Deactivating the Function Permanently (If Desired):

In some cases, there may be the possibility to have the ECO Start/Stop function permanently disabled through a dealership or via specific software programming. However, it’s worth noting that such a change may not be recommended in all cases, as it could affect overall fuel economy, emissions compliance, and warranty conditions.

7. Potential Issues with the ECO Start/Stop Function:

While the system is generally reliable, some drivers may experience occasional issues, such as:

• Battery Health: If the vehicle's battery is aging or low on charge, the system may not work as expected, and the engine may not turn off when idling. This is generally a sign that the system is protecting the battery from excessive wear.
• Inconsistent Engine Restart: If there’s a malfunction, the engine may not restart quickly or smoothly, which could result in hesitation when taking off from a stop.

In such cases, it's advisable to visit a Mercedes-Benz service center for diagnostics.

Conclusion:

The ECO Start/Stop function is a practical feature designed to enhance fuel efficiency and reduce emissions by turning the engine off during idle times. For those who prefer to have more control over their driving experience, it's easy to switch the system on or off using a button or through the vehicle’s settings. Whether you choose to keep the system active for fuel economy benefits or turn it off for performance reasons, the ability to control this feature ensures that Mercedes-AMG drivers can customize their driving experience to suit their needs.