The fuel feed tube quick connector can be removed by applying even pressure on both sides of the grey tab.
See a good video.
The plastic piece you are referring to sounds like it could be the retainer. See picture 1 below.
This needs to be removed to access the grey retainer, see picture 2 below.
Then use a suitable pry tool to apply even pressure on either side of the feed pipe grey tab, see picture 3 below.
Please let us know how you get along.
Images (Click to enlarge)
Thursday, March 24th, 2022 AT 8:55 AM