HELP lml coolant leak

[Jagermyster]

Hey guys i have a 2011 lml thats currently parked for the winter. I noticed a slight coolant drip from the drivers side bottom front of the engine block coming from a hole of some kind( ns if its a vent) and its dripping onto the skid plate.im Fairly new to diesels so any insight is greatly appreciated.

[txab]

Check water pump and wp gaskets