Suit for:
1. For VW PQ35 platform cars (Big Plug)
2. For radio 187A/B/E/F
2. This adapter is mainly used to solve the problem of
protocol and leakage for early cars (before 2009 years) which have 8
steering wheel buttons.
3.Whether the multi-function steering wheel can be used or
not, This depends on the match between the car itself and the decoder.