See also:

Recirculation/air quality system
Recirculation This function can be used to shut out exhaust fumes, smoke, etc., from the passenger compartment. The air in the passenger compartment is then recirculated, i.e., no air f ...

How HD broadcasting works
HD Radio works similarly to conventional radio and broadcasts of this type are available in many areas of the United States. However, there are a few key differences: Instead of transmitting one ...

C70 in the Market
The C70 is a good luxury convertible, but it's in a class where good might not be enough. Competitors — notably the Mercedes-Benz E-Class — do a better job of protecting those in the car from buff ...