How about Audi Q7? What does that addition and subtraction mean?

A plus sign indicates manual gear shifting, and a minus sign indicates downshifting.

The gears of automatic automobile gearbox are divided into P, R, N, D or S(2) and L( 1) from top to bottom.

Among them, the P gear is used for parking, and the rotating parts of the car are locked by mechanical devices, so that the car cannot move. When the engine is running, as long as the gear selector is in the driving position, the automatic car can walk easily. When parking, the selector lever must be pulled to the P position, so that the output shaft is locked by the parking brake device inside the transmission, and the hand brake is tightened to prevent the car from moving.

Extended data:

Precautions:

1, gear shifting should be timely, correct, stable and rapid. Automatic start, generally start with low gear (first gear). After the start, as long as the road conditions permit, it is necessary to quickly and timely shift into high gear step by step. Generally speaking, high-grade is more fuel-efficient than low-grade Therefore, it is necessary to shift up in time after starting, and do not delay the shift.

2. When the slope or speed decreases, don't force yourself to drive in high gear; It is also not allowed to use a lower gear for a long time when the road conditions are good.

3. Under normal circumstances, it is not allowed to forcibly shift into a low gear when the speed is high. It can only be used in some extremely special situations, such as the brakes are not suitable for ice and snow roads, or the brakes suddenly fail during driving and must be braked by the automobile engine.

4. trip stop is not allowed to shift gears when the car is driving, except in special circumstances.

Baidu Encyclopedia-Audi Q7

Baidu encyclopedia-automatic transmission