- Cable (Audi music interface)
- Calling up the TV menu
- Call list
- Calls
- Calls, ending
- Capacities
- Caps for wheel bolts, removing
- Car care
- Car keys
- Car telephone kit
- Catalytic converter
- CD
- CD-ROM player (navigation system)
- CD changer
- CDs, playing
- Central locking system
- Cetane number (diesel)
- Changing bulbs (rear lights)
- Channel Following
- Channel list
- Chassis number
- Child lock
- Child seats
- Cigarette lighter
- City events
- Cleaning
- Cleaning/de-icing windows
- Cleaning/treating natural leather
- Cleaning Alcantara
- Cleaning and care
- Cleaning carbon parts 1, 2
- Cleaning controls and displays 1, 2
- Cleaning decals
- Cleaning fabrics
- Cleaning leatherette
- Cleaning plastic parts
- Clock
- Closing
- Coasting mode
- Coat hooks
- Colour code
- Coming home
- Command (speech dialogue system) 1, 2
- Compact temporary spare wheel
- Compartments
- Conference calling 1, 2
- Connections
- Consumption (fuel) 1, 2
- Contact
- Control button
- Controls and displays
- Controls and displays (overview)
- Control units
- Convenience key
- Convenience open/close
- Cooling mode (automatic air conditioner)
- Cooling mode (manual air conditioner)
- Cooling system
- Copyright
- Country information
- Cover Flow
- Cruise control system
- Cue (Settings)
- Cup holders
- Current fuel consumption
- Cylinder management system
- Cylinders