The Citroën Hypnos is a concept car

Concept car

A concept vehicle or show vehicle is a car made to showcase new styling and or new technology. They are often shown at motor shows to gauge customer reaction to new and radical designs which may or may not have a chance of being produced....

 presented by Citroën

Citroën

Citroën is a major French automobile manufacturer, part of the PSA Peugeot Citroën group.Founded in 1919 by French industrialist André-Gustave Citroën , Citroën was the first mass-production car company outside the USA and pioneered the modern concept of creating a sales and services network that...

 at the 2008 Paris Motor Show

2008 Paris Motor Show

The 2008 Paris Motor Show took place from 4 October to 19 October 2008, in Paris Expo, Porte de Versailles.This edition of the Paris Motor Show featured a high number of hybrid and electric vehicles , a tectonic shift that led a New York Times blogger to ask, "Who killed the non-electric cars?".-...

. It has a crossover body style and is powered by a diesel

Diesel engine

A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...

 hybrid

Hybrid electric vehicle

A hybrid electric vehicle is a type of hybrid vehicle and electric vehicle which combines a conventional internal combustion engine propulsion system with an electric propulsion system. The presence of the electric powertrain is intended to achieve either better fuel economy than a conventional...

 drivetrain

Powertrain

In a motor vehicle, the term powertrain or powerplant refers to the group of components that generate power and deliver it to the road surface, water, or air. This includes the engine, transmission, drive shafts, differentials, and the final drive...

 with a rear axle-mounted electric motor

Electric motor

An electric motor converts electrical energy into mechanical energy.Most electric motors operate through the interaction of magnetic fields and current-carrying conductors to generate force...

. The car's most distinctive design feature is its interior, with rainbow-coloured, offset seats, and a system which analyzes the driver's face to gauge his state of mind and adjust the cabin lighting and scented air freshener

Air freshener

Air fresheners are consumer products used in homes or commercial products used in restrooms that typically emit fragrance. There are two broad air freshener categories: continuous action and instant action...

 fragrance in consequence.

Citroen announced that diesel-hybrid engine would be available in all models by 2015.

The concept car has appeared in several auto shows, including the 2011 Goodwood Festival of Speed

Goodwood Festival of Speed

The Goodwood Festival of Speed, commonly abbreviated as FoS and referred within the United Kingdom as simply the Festival of Speed, is an annual hill climb featuring historic motor racing vehicles that is held in the grounds of Goodwood House, West Sussex, England.Typically held in late June or...

.

Some of the styling features of this car are believed to be appearing on the upcoming DS5.