On the subject of car mats;
http://www.mycarmats.co.uk/acatalog/Citroen_DS4_Car_Mats.html
If you want custom.
Premier Autostyle are good, sort of similar to the above.
http://www.warnerscars.co.uk/carpet-mats/ds4-carpet-mats/
This is where I got my carpets from.
Geniune Citroen mats.
Funny on the main label , labelled for a C4.
However in the fitting instructions, it states C4 and DS4,
which is no suprise as they share the same floorpan etc.
Plus at the the moment they are only £27.99
As suggested previoulsy by another member.
Mind, on top these I have Michelin rubber car mats.
Also I got a Michelin bootmat which only cost 30 or so quid in Halfords.
Ok, isn't the extact shape as the Citroen one, but is good quality
and does the job, and best of all wasn't 80 -90 pounds from a dealer.
In the long run, I suppose with accessories, it depends if you want all
the proper stuff. It will look good, but you will pay for the privlige.
There was in the papers, where they did a price comparison, if you were buy all from
the dealer or buy similar products from other suppliers, the savings were quite considerable.
Another website for bits -
http://www.partsworld-uk.com/category/Citroen/Citroen_Parts___Accessories/Citroen_DS4/Citroen_DS4_Accessories,i.html?sortBy=FeaturedDesc
Hope this helps.