Mine took we a minute the first time also, it is 2016 but maybe similar. In the Front topside of both front wheel wells there is a little door about 3x5" ish. located where if You leave it open It'll be filled with mud from tire sling.
Open the door, go about elbow deep, and there is a 90 degree plastic slider (lock release ) measures say 1.5" wide x 4" Tall with a ,5" lip after the 90. I think It's In vertical position and You slide It up ,5", mine Was a stinker but this with release the headlight, then goback to headlight front, light will be loose with some wiggle remove 2 fasteners, and then pull thelight housing forward, wiggle the **** out of it trying to dislodge a metal shaft from a rubber donut type of Manuever. It'll come out.
You Might be able to change the bulb from inside the hatch leaving the slider and housing for another day.
thats from Memory, Somewhat of a travesty, but I'm gonna go confirm right you. Gen 4 but I bet it s Close only your 20 will be better.
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