Here's a "general" link for the 16 year model year overview:
http://www.mbusa.com/brand/container.jsp?/overview/index.jsp?persist=false

This I guess is 129 up to 1995:
http://www.mbusa.com/brand/container.jsp?/overview/overview_engine.jsp&yearModelCode=88_SL300CR&class=88_SL&rnav=012345678&menu=2_4

1996-1997 SL:
http://www.mbusa.com/brand/container.jsp?/overview/overview_engine.jsp&yearModelCode=97_SL320&class=97_SL&rnav=012345678&menu=3_3

You should be able to find the info you need with these 3 links.

Gilly