The Citroën C6 has laminated side windows with excellent acoustics. Made of two sheets of glass and one of plastic, the windows filter out exterior noise for a smoother driving experience.

The C6 has automatic air conditioning offering:

- customised temperature settings
- an air blower and separate passenger controls at the rear
- a soft diffusion system that creates a uniform blanket of air around the cabin.

NaviDrive telematics is a benchmark driving aid. From the central console or steering wheel you control the technology of the car, including:

- a hands-free Bluetooth(R) system
- a large 7" colour screen with GPS satellite navigation throughout Europe
- audio system (radio, MP3 player, 30Gb hard drive)
- access to Citroën Assistance, Citroën Emergency and Citroën On Line

The Citroën C6 has a high-spec JBL Hi-Fi system with:
- 8 loudspeakers
- 2 woofers
- bi-tuner
- a 240-watt amplifier for customised sound performance
- enhanced music playback throughout the cabin