Too bad you have it as a layman only once but VW has come in many models an antenna amplifier that will be supplied via the antenna cable with power, called phantom power - is missing here. Unfortunately, there are also no mention or link to it. But to get it only after you wonder about the poor reception quality of the radio.
In addition, the connectors are more shaky than fixed. One gets the feeling that they could be solved at the first pothole.
The so I do not like and are even the one star :-(