This adapter does exactly what it should. Here are the cables "positive and permanent positive" already exchanged. VW has its own wiring defies ISO connector. External devices need such an adapter or another permanent positive contact. In my case the device (car radio JVC KD-R811 and the FSA Parrot CK3100) run immediately and properly after connecting through this adapter. A fleecing of the battery is excluded.
There is no reconnection of the wiring, as perhaps in other ISO adapters needed. (Installed in the Polo 9N)
My recommendation for this part and, as always, for the very good purchase through Amazon.
