C Mode — Allows KITT to transform into a convertible (Introduced in the 4th season).
Cancel — This is used to cancel an ejection of a passenger.
Chemical Analyzer — This can determine the composition and origin of any substance that is placed inside of it.
CO2 — Blasts a steady stream of a Co2 mix (similar to a fire extinguisher) out from under the front bumper and is used to put fires out.
Composite Identification System — This function allows KITT to create a digital image of anyone on his monitors, minimal requirements to do so being a spoken description.
Comprehensive Configuration Analyzer — This can analyze any given vehicle or building within range and determine any possible weak spots.
Computer Printout — A printer located under the printers on KITT's dash.