See also:

CD/DVD Disc Maintenance
To keep a CD/DVD in good condition, take the following precautions: 1. Handle the disc by its edge; avoid touching the surface. 2. If the disc is stained, clean the surface with a soft cloth, wipin ...

Engine
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Recirculation
Move slider (B) to . This function is particularly useful when the outside air is heavily polluted (in a traffic jam, tunnel, etc.). However, it is better not to use it for long periods, especial ...