See also:

Speedometer
The speedometer shows the vehicle speed. ...

Precautions against vehicle modification
To avoid accidental activation of the system or rendering the system inoperative, which may result in serious injury, no modifications should be made to any components or wiring of the S ...

Emergency Locking Retractor (ELR)
The driver’s seatbelt has an Emergency Locking Retractor (ELR). The emergency locking retractor allows normal body movement but the retractor locks automatically during a sudden stop, impact or if ...