In most cases it is cheaper to buy spare parts in the accessories than from the brand dealer. But only in most and not in all. The fact that it is also the other way around shows the company Hornig from the Bavarian Cham, which has specialized in accessories for BMW. On their website I landed on the search for an adapter cable to connect the Navi to the cartool – cable of the K 1300 GT. Only limp 19.95 Euro calls this company for the article, which in the Herste I bought the identical article from BMW (AHG Balingen): 5,65 costs the part with the friendly. Price difference 14,30 euros. I call the behavior of the company Hornig Abzocke.