Connection device comprising a motor vehicle pipe and a connection fitting

The assembly (1) has a motor vehicle fluid line (2) provided with a single rolled or double rolled inner tube (7) made of aluminum. A connection fitting i.e. threaded fitting (3), is arranged in contact with the inner tube, where a surface of the connection fitting consists of aluminum in a region of a contact surface between the connection fitting and the inner tube. The connection fitting is formed with a hole (13) in which the fluid line is inserted. A front end (14) of the connection fitting defines a stop surface, which rests against a flange (12) of the fluid line. The flange is an F-flange or an E-flange.