motor-talk.de de gördüğüm bir ses sistemi
http://www.motor-talk.de/forum/car-hifi-im-opel-astra-j-sports-tourer-mit-werksradio-t3230304.html?page=1#post30303327
http://www.motor-talk.de/forum/car-hifi-im-opel-astra-j-sports-tourer-mit-werksradio-t3230304.html?page=1#post30303327