2010 Hyundai Santa Fe 2.2R Diesel filter

Water in engine compartment fuel filter bowl. The vehicle handbook says that if warning light comes on head immediately for Hyundai service centre. As I travel in outback/country areas that may not be possible. How can I, "on the road". Drain the filter bowl, new filter fitted if req, and system bled for air. I know there is a fuel pump in the tank. There are several sensing wires attached to the filter housing. I don't know if there is a second pump at that point. Access is limited from above, service centre said they access from underneath, which would be difficult "on the road". It appears to me that the unit could be removed from the vehicle, with difficulty, is this the way to do it? There is no manual pump to bleed the system, however, I understand the service people after reassembly leave certain wires off the filter and use the in tank pump to pressurise the system. I don't know how they bleed the air.