Practical information and SCR system ® AdBlue for BlueHDi Diesel engines To assure respect for the environment and is held in a special tank with ® The AdBlue tank is empty, a ® Once the AdBlue conformity with the new Euro 6 emissions a capacity of about 15 litres: this provides system required by regulations prevents standard, without Popular posts on the C3 forum. Citroen C3 Central locking stopped working! [SOLVED] Help! I can't log in. Hi I have a 1.6 HDI 16V (92bhp) Diesel. Now I think I need to top up the DPF additive only I cannot find the tank - is there such a thing?, the usual go to your dealer in the manual! zcrKlW7.