Well, I got a reply to my e-mail to Mercedes Classic and they sent me all the production information to my SL and they even have records for the recalls that has been performed while the previouse owner had it including the sub-frame. Something was very important to me was the production codes for colors of the interior and especially the exterior as I have not seen another SL yet with that color combination. The exterior is code 172 anthracite grey body & hardtop and the interior is 207 red leather. They even verified the work performed on the Sub-frame recall and they said that the whole Sub-frame was changed on MB expense ( No welding done, just complete change ).