Citroën C5

First generation (DC/DE, 2000–2007)

The first generation C5 was available as a five-door hatchback or five door wagon styles only. Unlike its predecessors, the C5 was a hatchback with a three-box design and a hatch. This form actually disguised the hatch, so Citroën has completely reversed the design philosophy from the fastback saloon era of Robert Opron. Power came from 1.8 and 2.0-litre straight-4 and 3.0-litre V6 petrol engines as well as 1.6, 2.0 and 2.2-litre direct injection diesel engines.

The first generation C5 was the last Citroën developed under the chairmanship of Jacques Calvet (1982–1999).

The C5 had a further development of Citroën's hydropneumatic suspension, now called Hydractive 3. The major change with this system was the use of electronic sensors to replace the mechanical height correctors seen in all previous hydropneumatic cars. This allowed the suspension computer to automatically control ride height: at high speed the suspension is lowered to reduce drag and at low speeds on bumpy roads the ride height is raised. Manual control of ride height was retained, though it was overridden by the computer if the car was driven at an inappropriate speed for the selected height. Certain cars also featured the computer controlled ride stiffness, called Hydractive 3+.

In a major break with Citroën tradition, the brakes and steering were no longer powered by the same hydraulic system as the suspension, but the power steering used the same LDS fluid with its own pump. It has been speculated that the primary driver for this was the cost of developing electronic brake force distribution for the system when the PSA Group already had an implementation for conventional brakes. Another factor may be the highly responsive nature of 'traditional' Citroën brakes, which some have found hard to adjust to on other hydropneumatic cars, though it is felt by some to be superior.

In September 2004, the C5 underwent a major facelift (new front and rear ends; same centre section) to bring it into line with the look of the new Citroën C4. The hatchback was lengthened from 4,618 mm (181.8 in) to 4,745 mm (186.8 in) and the wagon from 4,755 mm (187.2 in) to 4,840 mm (190.6 in). Also this new version got swivelling directional headlights.

The Hydractive suspension improves ride quality, keeps the car levelled, and enables the car to drive on three wheels if one tire is flat. The suspension is derived from the Hydropneumatic suspension used in the 1950s Citroën DS. Variations in height using the Hydractive suspension range up to 15 mm (0.6 in) in the front and 11 mm (0.4 in) in the back.

Production ended in December 2007, with the final production number being 720,000. In the United Kingdom, from 2001 to 2004, 45,502 models of the car were sold.

Second generation (RD/TD, 2007–present)

The second generation C5 was officially unveiled in October 2007, and does not retain the hatchback body style, instead being a regular, three box saloon of an aerodynamic shape. However, this second generation is often criticised, especially by core Citroën fans, for its German-like exterior design, which makes it look more like a German saloon, than a French one. It was launched in February 2008, with the wagon version following in May 2008, and receives the name of Tourer. This C5 won 2009 Semperit Irish Car of the Year, as well as being awarded 2008–09 Japan's Import Car of the Year.

The second generation is available with conventional springs as well as the hydropneumatic suspension and 2.7L Ford AJD-V6/PSA DT17 engine from the Citroën C6. In 2009 the 2.7L was replaced by an updated 3.0L unit which, despite offering more power, has improved fuel consumption and emissions. In 2010, the 2.0L HDi 140 and the 2.2L HDi 173 engines, were replaced by the 2.0L HDi 160 engine, mated to a 6 speed automatic or manual transmissions to comply with the Euro 5. Similarly, the 2.0L 16V 143 bhp petrol engine was replaced by the 1.6L THP 155, from the DS3 mated to a six speed manual transmission.

In 2011, the C5 was given an mild facelift, with a few cosmetic changes, such as LED lights. Three engines were added to the range consisting of two diesels, 2.0 HDI 160, and an 2.2 HDI 200 as well as a petrol engine, 1.6 VTI 120.

In July 2012, the C5 was given another mild facelift, with an few cosmetic changes, such as softer chevron badging, modified badging of C5, softer chevron "grille" as per the recently updated C4, and exclusive badges (on the Exclusive) on the sides in front of the front doors. For the Exclusive the onboard GPS/radio head was also changed to the eMyWay unit which features full bluetooth connectivity and iPod/USB interface.

In May 2016, the C5 was officially withdrawn in the United Kingdom, due to disappointing sales of 17,105 since 2008. In 2015, only 237 examples were sold, the lowest number since the car's launch. This is comparison to 6,549 sales in France within 2015. However, this could be due to the model being launched at the start of the financial crisis in 2008, as well as increased demand for crossover models.

Sharing the same underpinnings of the Citroën C6, which has since been discontinued, this generation of C5 is often referred to also as the "X7". It is observed that on these cars two technical entities, the hydropneumatic system and the double wishbone layout, are utilized in conjunction.

E-Touch Comprising a package of services including the emergency and assistance calls, Citroen eTouch also proposes a virtual maintenance manual and an Eco-Driving service accessible via the MyCitroen personal area on the web. For calls, Citroen eTouch works completely independently. The system is equipped with a GPS module, and a SIM card, with no need for a call plan and unlimited over time.

The vehicles features two buttons, "SOS" for emergency calls (the call is also triggered automatically in the event of impact) and "Double Chevron" for assistance calls. The emergency call gets emergency services to customers faster, for accident victims and bystanders alike. The two services are free and available at any time.