Many people will use the brakes to control the speed when driving down the steep slope, or the owner of the manual gear will hang the gear on the low gear and use the engine to control the speed. In places where the downhill section is not so long, these methods are quite good, but when facing a long downhill and downhill steep slope, the steep slope slow descent function is really necessary.
Speaking of the steep slope and slow descent function, in fact, it is also a technology that has been developed for many years. The system was first used on Land Rover's Freelander in 1997. Then, as the owner of Land Rover at the time, BMW used it on the BMW X5.
Then, many car companies have adopted similar technologies. The advantage of this technology is that you don't need to step on the brakes all the time, and the mystery of the vehicle deceleration is not the brakes, but the engine itself.
By turning on the steep slope slowing function, the engine can provide a considerable degree of deceleration effect, so the driver does not need to press the brakes and throttle at all.
That said, all you have to do is press the ramp button, see the feature activate from the dashboard, and control the steering wheel. The vehicle itself will help you control the speed of the car, do not need to step on any pedals, do not need to wear the brakes frequently, so that it is safer for the long steep slope. This feature is best taken into account when you're packing your bags and getting ready to cross the mountains in search of poetry and faraway places.