Should I use S gear or D gear on the highway?

[MaryLee]

On the highway, you should use D gear. The gears of an automatic transmission car include: 1. P gear is the parking gear, used for long-term parking of the vehicle; 2. R gear is the reverse gear, engaged when the vehicle needs to move backward; 3. N gear is the neutral gear, used when the vehicle is parked for a short time without turning off the engine; 4. S gear is the sport mode, making the vehicle drive more sportily; 5. M gear refers to the manual mode, where the driver manually shifts gears when the gear lever is in M position. The method for reversing an automatic transmission car: 1. Press the brake to stop the car completely, hold the lock switch on the gear lever and shift to R gear; 2. Observe the rearview mirrors and the reversing camera, ensuring there are no obstacles behind the car, and honk twice to alert pedestrians and vehicles nearby; 3. Slowly release the brake to allow the car to move at a low speed.