See also:

Speedometer
The speedometer 1 indicates vehicle speed in miles per hour (MPH) and kilometers per hour (km/h). ...

Underbody
In areas where road salt is used in winter, the underbody must be cleaned regularly. This will prevent dirt and salt from building up and causing the acceleration of corrosion on the underbody ...

Measurement of weights
Secure loose items to prevent weight shifts that could affect the balance of your vehicle. When the vehicle is loaded, drive to a scale and weigh the front and the rear wheels separately to de ...