What is the button on the automatic gear shift lever?

[AlinaFitz]

This is the shift lock button. It must be pressed when shifting gears, especially when switching to R, P, or 1 gear, primarily to prevent accidental operation. Below is relevant information about automatic transmissions: 1. Automatic Principle: The engine's power is transmitted through the gearbox, which is also a key factor affecting fuel consumption. Generally, automatic transmissions consume 10% more fuel than manual transmissions. Whether manual or automatic, more gears mean better fuel efficiency. 2. Driving Tips: For manual transmission vehicles, higher RPMs should be used when upshifting. Engines are designed to operate at higher RPMs, with various components' dynamic balance and rotational inertia parameters based on high-speed conditions. Prolonged operation at abnormal RPMs increases internal component load and wear, leading to frequent vibrations and knocking, and reduces engine lifespan. Choosing 3000 RPM as the upshift point ensures the engine operates within a healthy RPM range, with post-upshift RPMs around 2300.