Sealing element for sealing fluid lines in a feed-through opening of a wall and sealing arrangement with the sealing element and method for mounting the sealing arrangement

A sealing element for sealing fluid connection lines in a feed-through opening of a wall, the sealing element comprising:

• a first front wall with at least two first insertion openings for receiving first fluid connection lines, and
• at least two second insertion openings for receiving second fluid connection lines, wherein the second insertion openings are formed in a second front wall, the first front wall and the second front wall each arranged in a plane formed by y, z directions and connected to one another with a first circumferential wall aligned in an axial x direction of the first fluid connection lines and the second fluid connection lines, the first circumferential wall formed with an expansion function for variable spacing of the first front wall and the second front wall in the axial x direction of the first fluid connection lines and the second fluid connection lines.