The tachometer shows the engine speed in revolutions per minute (rpm). The tachometer can help you select a more economical driving mode, and also warns you when the engine speed exceeds the maximum allowable value.
Attention: While driving, watch the tachometer readings. Its arrow, showing the engine speed, should not enter the red zone (zone of exceeding the maximum permissible speed). Doing so may cause serious engine damage and void your warranty.