The eco start/stop feature, designed to save fuel and reduce emissions, automatically shuts off your engine when your car comes to a complete stop. While beneficial for the environment, many drivers find this feature annoying and prefer to disable it. While there isn’t a universal “permanent” off switch, there are several methods to effectively deactivate or minimize the activation of the eco start/stop system.
Understanding Eco Start Stop
Before delving into how to disable it, it’s crucial to understand how the system works. The core components involved include a crankshaft Hall sensor, which identifies the crankshaft’s rotational direction and piston position for optimal restarting. Fuel is injected into the ideal cylinder first, accelerating the starting process. An electric transmission oil pump maintains oil pressure in the automatic transmission clutches, ensuring a swift take-off after the engine restarts. The starter motor has been significantly modified to withstand a much higher number of starts compared to traditional starters. According to Daimler, it’s designed for eight times as many starting procedures. Finally, a second battery supports the increased electrical load.
Methods to Disable Eco Start Stop
1. The “Off” Button: Many vehicles equipped with eco start/stop have a button (often labeled “A Off”) located near the gear shift or on the center console. Pressing this button typically disables the system for the duration of the current drive cycle. However, the system will likely re-engage the next time the vehicle is started.
2. Driving Mode Selection: Some cars offer various driving modes (e.g., Sport, Comfort, Eco). Selecting a mode other than “Eco” may automatically deactivate or reduce the sensitivity of the start/stop function. Refer to your vehicle’s owner’s manual to confirm if this applies to your model.
3. Battery Charge Level: The eco start/stop system relies on a sufficient battery charge to function. If the battery charge is low, the system may automatically disengage. While not a reliable method for permanent deactivation, it highlights the system’s dependence on battery health.
4. Aftermarket Solutions: Some aftermarket devices can be installed to permanently disable the eco start/stop function. However, modifying your vehicle’s electrical system could potentially void warranties or negatively impact other vehicle functions. Consult with a qualified mechanic before considering this option.
Long-Term Considerations
While manufacturer claims suggest the modified starter can handle frequent starts, long-term reliability remains a concern for some drivers. Whether the “eight times” claim holds true in real-world conditions with extended use is yet to be seen.
Ultimately, the best approach depends on your individual preferences and vehicle model. While a true permanent solution may not always be readily available, understanding the system and utilizing the available methods can significantly reduce the frequency of eco start/stop activation. If considering aftermarket solutions, professional consultation is highly recommended.
