On mine it is a card stock peice of paper that is just held in by some tabs on the lid of the fuse box. I have an Euro W126 so it is most likely a diferent chart. I would be willing to scan and e-mail what I have if you think it may help you.

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Currently
1991 Mazda Miata 174000
1991 Subaru 189,000 Winter beater

got rid of:
1984 VW Vanagon 195,000
1976 350SE Euro 185,000 KM
1973 280SE 4.5 (boy do I regret that)
1980 280SE European W126 4 speed manual (miss it)
1989 BMW 735iL 119000 (good riddance)