just finished install in a 2006 mb sl65 (v12 bi-turbo)
complete removal of stock and rebuild, kenwood HU, focal 6.5 MB, 5.25 midrange in doors, tweets in A pilar powered by JL450.4, JL 13tw5 in fiberglass box in passenger footwell powered by a JL 1000.1, customer posted pics on MBforms:
AMGfan 2006 SL65 Audio Upgrade thread... - MBWorld.org Forums

hand made door mounts and dash kit - no wood, all plastic, either abs or incerta