Particularly efficient running gear
The C6 boasts impeccable road manners, based on an original combination of sophisticated running gear and an active suspension system featuring electronically controlled springing and damping. This exceptional set-up offers a response to the eternal conflict between the dynamic capability and the comfort of the suspension. 
Superlative road manners and steering comfort demand careful body control and thus a firm suspension, a set-up that impacts on vertical comfort.
They also require precise control of the wheel position and thus fairly stiff axle bushes, a set-up that makes it more difficult to provide the damping necessary for effective vibration control.
To separate these functions and thus eliminate their mutually antagonistic effects, the C6 implements innovative technical solutions to set superlative standards in every respect.
The first step is to separate the damping and steering functions. The front and rear suspension is of sophisticated design with special bushes that are able – by virtue of their architecture and functional characteristics – to manage the force transmitted to the body in specific ways.
The second step involves analysing each driving situation and managing it in consequence. Here, the emphasis is on body control and vertical comfort. The active suspension with electronic springing and damping comprises two stiffness settings and 16 damping settings. This makes it possible to manage the suspension in real time, in order to adapt to a full range of driving situations.

Principles applied to the optimisation of comfort
Generally speaking, the comfort of a vehicle is defined by its ability to soak up bumps and dips in the road. This ability is measured in different ways:
wheel-ground damping:
The tyre is the component that transmits guidance force to the ground. It is also the first component to transmit vertical movement and vibrations from the road. 
vertical wheel-body damping:
The suspension manages the vertical force between the wheel and the body. With its active suspension and electronically controlled springing and damping, the C6 optimises both body control and vertical comfort.
longitudinal/lateral wheel-body damping:
This damping function is performed by the front and rear suspension. These sub-systems also control the wheel position and thus contribute to on-road behaviour, driving pleasure and active safety. The C6 is the first car to combine hydraulic suspension with double wishbones, a linked hub carrier and a filtered subframe at the front, and a multi-link set-up at the rear.
body-passenger damping:
The seat is the last stage of damping between the road and the passengers. On the C6, the front and rear seats are designed to optimise damping and minimise the vibrations transmitted from the body to the passengers.