
E stands for the economy mode, with lower engine speed and earlier gear shifting; S stands for the sport mode, with higher engine speed and later gear shifting. E is the abbreviation of ECO (Economy); S is the abbreviation of Sport (Sport). After pressing, the display will show AE or AS. AE is the economy mode; AS is the sport mode. Here are the relevant details: 1. The name ECO is derived from the combination of Ecology (environmental protection), Conservation (energy saving), and Optimization (power). ECO is commonly referred to as the economy mode (energy-saving mode). 2. The working principle of the ECO mode mainly involves adjusting various parameters such as transmission gear position, engine speed, braking system, and transmission oil temperature through various sensors. The vehicle's computer (ECU) then calculates the optimal fuel injection amount to achieve fuel-saving purposes. Essentially, it controls the car to avoid prolonged idling or low-speed driving and prevents sudden acceleration, thereby achieving the goal of fuel efficiency. 3. The S gear, short for sport in English, is the sport gear. Many car models refer to it as the sport mode. Engaging the S gear will cause the car to shift gears more slowly or downshift earlier, keeping the engine at a higher speed and increasing torque output to provide greater power and enhance the vehicle's acceleration performance. In this mode, fuel consumption will increase. The S gear is often used for overtaking, climbing hills, and similar situations.

When I first started driving, I also wondered what these letters on the dashboard meant. Actually, E/S are just two automatic transmission driving modes for switching. E stands for Eco mode, which is suitable for daily commuting—the car shifts gears gently to reduce fuel consumption, and the throttle feels soft. S is Sport mode—once pressed, the whole car feels like it's been injected with adrenaline, revving super high before shifting gears, and the acceleration push is very noticeable when overtaking, though fuel consumption also skyrockets. As for the number 510, it's probably a specific model code or a typo—most cars simply label the button as E/S. Switching between these two modes is super practical: use E in traffic jams to save fuel, and S on highways for a thrilling ride!

When I first bought my automatic transmission car, the ES button next to the gear shift confused me. Later, I asked an experienced mechanic and learned that E/S is actually a toggle switch between two personalities—in E mode, the transmission is very laid-back, quietly shifting to the highest gear just after 60 km/h, with the engine noise as quiet as a mosquito. But when switched to S mode, it feels like a completely different car—the engine roars past 4000 RPM before shifting, and it can leave other cars far behind at traffic lights. This design is really thoughtful. I use E mode for daily commuting to save 10% on fuel, and switch to S mode on weekends for mountain drives to enjoy the thrill of driving. The 510 probably isn’t a universal label—it might be a special marking from a particular brand.

Most modern automatic transmission vehicles now come with an E/S mode switching function, which essentially allows drivers to toggle between two distinct driving styles. When engaged in E (Eco) mode, the transmission response becomes gentle, shifting gears as smoothly as stroking a kitten—perfect for carrying family members with seamless comfort. Switching to S (Sport) mode instantly transforms the car into a hot hatch: delayed upshifts lock the RPM in higher ranges, and every press of the accelerator is met with an excited growl from the exhaust. A word of advice—avoid using S mode in rainy conditions, as the tires are far more prone to slipping. Many vehicles also offer M (Manual) mode for manual gear shifts, but E/S remains the most hassle-free option. As for the number 510, it’s likely a display error or refers to a specific function.

The E/S letters displayed on the car dashboard can be quite confusing for beginners, right? Actually, these represent the driving mode selection for the automatic transmission. When you select E mode (Economy), the vehicle's computer prioritizes fuel-saving logic. For example, the transmission will shift to 6th gear as soon as your speed reaches 55km/h, cruising RPM stays around 1500, and power delivery remains smooth even with AC on. Switch to S mode (Sport) and it's completely the opposite - stomp the accelerator and the engine might rev up to 6500rpm redline, with aggressive gear hold for that exhilarating roar, making it perfect for consecutive mountain curves. That 510 is probably just a dashboard display code or model number - focus on the E/S position instead. Using E mode daily can save you 0.8L fuel per 100km!


