Quick connector with tool release

A quick connector for connection to a counterpart that is complementary to the quick connector, wherein the quick connector comprises:

• a coupling piece;
• and
• a retainer;
• wherein the coupling piece has a fluid line end for connection to a fluid line and a coupling end for introducing the counterpart, wherein a fluid channel of the coupling piece fluidly connects the coupling end to the fluid line end, wherein a section of the fluid channel assigned to the coupling end has a coupling center axis, wherein the coupling center axis defines an axial direction (AD), a radial direction (RD) and a circumferential direction (CD),
• wherein the retainer is allocated to the coupling end, wherein the retainer has at least one retaining element for retaining the counterpart, wherein the retainer comprises at least one actuating element for opening the retainer for pulling the counterpart out of the coupling piece,
• wherein the coupling piece comprises a first flange at the outside of the coupling end and a second flange having a flange aperture, wherein the first flange has a flange opening structured for insertion of a tool into the flange opening so that the tool can pass through the opening to exert a force on the retainer and the actuating element, respectively, wherein the flange opening has an outer border, and wherein the outer border lies in radial direction (RD) outward of the flange opening.