I have some pics of my custom stereo install in my '91 300SL.
Head Unit is an Alpine CDA-7897 cd/mp3 foldout face also with a alpine 6disc mp3 changer. Amplifier I had a Zapco 6 channel. Speakers are all Diamond Audio, 6.5"/4.5"/1" three way up front and two 10" subs right behind the seats and still have room to store stuff back there too. All wired together with Zapco symbilink system (no RCA's and zero distortion).
it's soo clean and loud that I can't hear the wind when i'm driving!!
I've got some pics of it here.