I thought I had managed to select all the toys that I wanted on my new Crossback but apparently not... it seems that Citroen have been drip-feeding their dealerships with information on the new DS4 and DS4 Crossback, and at the time I ordered mine neither the dealer or I were aware that front parking sensors and blind spot detection were optional extras, even though the rear facing camera was standard.
Unfortunately I've discovered this too late to get them added as my car is now in production, so I thought I'd flag this just in case anyone else is going to be ordering one. There is now a list of standard equipment and optional extras on the dealers' system which wasn't there in early December, so make sure your dealer is aware of it and hopefully you won't get caught out like me.
On the bright side, knowing the car is in production has improved my day!
Now: 2018 DS7 Crossback Ultra Prestige PureTech 225 Auto, Absolute Red
Was: 2016 DS4 Crossback, BlueHDi 180 S&S EAT6 Auto, Ink Blue Metallic
Was: 2013 DS4 HDi 160 Manual DSport, Babylon Red