What is Eco mode on Mercedes?
John Castro
Published Mar 14, 2026
What is Eco mode on Mercedes?
The ECO Start/Stop system is designed to help save fuel and reduce emissions from your Mercedes-Benz. When you come to a complete stop and the engine is not needed, like when at a stop light or waiting at a train, your Mercedes-Benz will automatically shut off the engine.
How do I turn off Eco mode on my Mercedes?
Once you have located the OBD2 port, turn the ignition but do NOT switch the car on. Put the plugin into the OBD2 port and wait for the main screen to “reboot.” Once this has happened, the green light will be off and the ECO start/stop function will be disabled.
Why is my eco light yellow?
Green = all conditions are met, engine will be shut down when the vehicle stops. Yellow = ECO is active, but conditions are not met. No ECO symbol displayed = ECO is switched off or has been deactivated due to an error.
When should you use Eco mode?
Selecting Eco Mode in your vehicle helps you reduce fuel consumption. In most vehicles, selecting this setting makes the engine and accelerator pedal less responsive to inputs. You might feel that the car is “slow” because it has become unresponsive.
Does Eco Mode hurt engine?
No, there is no more harm done to the car while driving in ECO mode versus driving in “Regular” mode. ECO mode on most modern cars does a couple of things to help increase fuel economy: The transmission shifts at a lower engine RPM.
Is Eco start/stop bad for engine?
In short, stop-start systems can help you save fuel, and they won’t damage your engine.
What is ES button on Mercedes?
E = Economy , transmission starts in second gear changes gears at liwer RPM’s to enhance fuel economy. S= Sport, starts in first gear and changes gears at higher RPM’s.
Does ECO Start Stop save fuel?
Most people think the amount of fuel saved using a start-stop system is negligible, but in reality, that fuel burned while idling at a stop adds up quickly. A study by the Society of Automotive Engineers found that using start-stop can see a car’s fuel economy improve by over eight percent in heavy traffic.
What is ECO Start Stop function?
Switches off the engine when the vehicle is stopped. When the engine has automatically been switched off, lighting, air conditioning and radio remain on while the vehicle is at standstill. Once the engine is needed again, it quickly and silently starts to enable swift moving off.
Does Eco mode on Mercedes save fuel?
The Mercedes-Benz ECO Start/Stop system saves fuel and reduces the vehicle’s emissions by shutting off the engine in situations where the vehicle is not in motion. The engine will also remain on if the climate control system needs the engine running to heat or cool the cabin.
Why is my eco light not working Mercedes?
If the ECO button does not light up at all it is usually a fault with the auxiliary battery.