Where's the adblue filler, ds5 hybrid?

[aston]

Hi all, my wife has a 2013 Citroen ds5 hybrid which is warning "running low on particulate filter additive " , on the moment hybrid cars the filler and tank is in the boot however this one's boot is full of battery and motor, no sign of a tank, nothing in the book or online, so I'm hoping someone here can help,,,,,
Thanks

 

[obi_waynne]

Have you looked under the boot floor? There might be a small flap, it will have a small black cap, then a blue cap.

The location is in the middle towards the rear of the boot.

 

[wizzer]

I thought this was a dealer only topup on those! Done at service time apparently.