I can remember back to the day when Rootes Group and British Leyland and Triumph had Acres and acres of airfields full of brand new cars stockpiled. I can also remember manufacturers such as Land Rover having a fleet of demonstrators which eventually they would sell through their dealers.
How long since the OPs car had actually been manufactured?
To the original poster. You need to ask Citroen what date that it rolled off the production line.
Many towns have VOSA inspectors that are just that. Ours is the local council. Ask about a VOSA inspection and notify VOSA of the faults as this could affect other Citroens. I still suspect it is a damaged car.
A bit of research:
the DS5 became in 2011 the first Citroën branded car to be assembled in Peugeot's lead European plant at Sochaux.
The reality of the DS5’s conventional suspension set-up is a fairly mediocre ride that is at best settled but short of sophistication, and at worst plies an uncomfortable blend of vague, unsettling body control and an intermittently grimace-inducing lack of bump absorption.
The weight of the car is noticeable as it shuffles from corner to corner in vigorous driving, while the ride is at its jarring worst under high cornering forces, where the DS5 feels fidgety and unsettled. Substantial steering kick-back over very poor surfaces at high speeds is another discomfiting trait.
Have a look at the picture in Autocar here http://www.autocar.co.uk/car-review/citroen/ds5/design You can see a colour difference even on their demonstration car.
Verdict: Terrific piece of design that utterly grows on you, and with a lovely cabin. But the ride on 19in tyres is shakier than a robber’s defence.
There are serious sums of money at stake here. The OP needs to get professional advice NOW rather than relying on an internet forum.
Particularly when some of the posters on that forum are asking totally irrelevant questions.
The rear bumper is made from the same material as the front one and yet the paint finish is the same as on the rest of the car. There is no color or shade difference between rear bumper and the metalic body.
Maybe so but this weekend I have been around 6 different dealers and not seen one car out of hundreds with mismatch paint. The only firm I know who can't be bothered matching paint correctly is a UK multi repair outfit who I wouldn't let near any of my cars. Blue is blue to them not the variances that exist.