This module is not for mfd1 navi in passat 2003.You need more than 3 cables connected in blue adaptor.I am very dissapointed.
I have try it in a golf 4 from 2002, 1.6 16v, with gamma radio. Once it is powered, the bluetooth controller is visible and I can connect tot it from my phone. The problem is that the controler does not make the radio play the signal from the controller. It does not "see" the bt controller as a cd changer. So i could not play music on the radio from the bt controller. It smply does not work. Do not buy.