其中，至少一个输送流体连接到流体传导连接器的管路和至少一个用于输送至少一个流体介质，特别是用于SCR催化剂体系尿素溶液的通道提供机动车辆的流体导管。 管道至少在其长度L的一部分上具有流体承载外部管线和容纳在外部管线中的流体承载内部管线。 连接器具有第一连接分支，该第一连接分支与外线流体连通并且具有与内线流体连通的第二连接分支。

wherein at least one fluid conveying conduit and at least one connected to the pipe of fluid-conducting connector is provided motor vehicle fluid conduit for conveying at least one fluid medium, in particular for the passage of urea solutions for SCR catalyst systems. The tubing has over at least part of its length L is a fluid-conducting line and an outer recorded in the external conduit fluid-carrying inner pipe. The connector comprises a first connection branch on which is in fluid communication with the external conduit and has a second connecting branch that is in fluid communication with the inner conduit.