- Cable (Audi music interface)
- Calling up the TV menu
- Call list
- Calls
- Capacities
- Capacity 1, 2
- Caps for wheel bolts, removing
- Car care
- Car keys
- Car telephone kit
- Catalytic converter
- CD
- Central locking system
- Centre armrest
- Centre console lighting, adjusting brightness
- Cetane number (diesel)
- Channel Following
- Channel list
- Charging/changing battery
- Child lock
- Child locks
- Child safety switch
- 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 fabrics
- Cleaning leatherette
- Cleaning plastic parts
- Cleaning seat upholstery
- Clock
- Closing
- Coat hooks
- Collapsible spare wheel
- Colour code
- Coming home
- Command (speech dialogue system) 1, 2
- Compact temporary spare wheel
- Compartments
- Conference calling 1, 2, 3
- Connections
- Consumption (fuel)
- Contact
- Control buttons
- Controls and displays
- Controls and displays (overview)
- Control units
- Convenience key
- Convenience open/close
- Cooling mode (air conditioner)
- Cooling system
- Copyright
- Cornering light
- Country information
- Cover Flow
- Cruise control system
- Cue (Settings)
- Cup holders
- Current fuel consumption
- Cylinders 1, 2
Instruction book Audi A4 Version Year 2014