I have 92 600SEL with the factory 10 disk changer that I'd like to replace with Alpine. My understanding is that I need MBZALP9 adapter from Peripferal and some cables from MB. Do I need all 3 cables listed at the Peripferal web site (Q 6 82 0135, Q 6 82 0174, Q 6 82 0175) or some of them are part of the factory CD?