See also:

Accelerator downshift — in D position —
For passing or hill climbing, depress the accelerator pedal to the floor. This shifts the transmission down into a lower gear, depending on the vehicle speed. ...

Brakes
If the brakes do not operate properly, have the brakes checked by a NISSAN dealer. Self-adjusting brakes Your vehicle is equipped with self-adjusting brakes. The front and rear disc-type brakes ...

NISSAN dealer.
However, now and then you may notice light spark knock for a short time while accelerating or driving up hills. This is not a cause for concern, because you get the greatest fuel benefit when ther ...