When this group was founded, one of the goals was to publish a W113 manual, first on the web in Wikipedia format, then as a book, which would serve as the ultimate reference to W113 issues. Various members were selected to write chapters for this book. My chapter, W113 data cards and codes, includes a list of the color codes with photos for most of the available colors - of course many of these photos are from this website.
Lately, it looks that the idea of this manual has died, maybe due to time constraints, or due to copyright issues, I don't know.
Both the Classic Center in Germany as well as here in the US have microfiche for all W113 produced, as well as the data cards, but they are not in a data base. It would be possible to establish such a data base, but for DaimlerChrysler such an endeavour certainly right now has zero priority.
Statistics on A/C would not be included in this anyway, since A/C never was a factory option but always dealer installed.
Klaus
1969 280 SL