Hello and good evening. I need some help. In my W123 Coupé I would like to install a new electrical antenna. I have already expanded the old one. From the car/radio a red, a black and a white cable arrive in the trunk. From the new Hirschmann antenna a red and a green one come. If I close the cables together as in the instructions of the antenna then you will not drive again. I should. Instructions connect the red and green of the antenna to the red plus pole cable from the car/radio. But what I want is that the antenna as before with the old antenna only shuts out when I turn on the radio. And when I turn off the radio it should start again. But when I have switched off the radio the right cable combination is not found. I have already connected the red cable from the antenna motor with the black cable and the green one from the antenna motor with the red plus pole cable. Then the radio leads on and see, the antenna runs out. But when I switched off the radio again the antenna has remained outside. WER CAN connect the antenna with the blue cable and the green one from the antenna motor.