See also:

How do states use OBD II for emission inspections?
Many states connect a computer directly to a vehicle's OBD II system. The inspector can then read "faults." In some states, this type of inspection has replaced the tailpipe emission ...

Using City Safety
NOTE The City Safety™ function is activated automatically each time the engine has been switched off and restarted. ...

Custom Build Program
In addition to traditional optional features like a navigation system, power moonroof and Sirius Satellite Radio, buyers who want to customize the C30 can do so through Volvo's Custom Build progra ...