Technical Water in diesel filter warning and ad blue warning.

[Declanmc1]

Has anyone got the all black plastic type filter housing? DUCATO MH 2020. Its very hard to reach and assume light has to come out. I can fell a hexagonal item at the bottom of the housing. Does this turn to release any water? I have the water in diesel filter light on. Its strange as only seems to come on when the ad blue warning light comes on. These both used to turn off when i filled with ad blue but now ad blue light will not turn off even after filling. Concerned...