Here's some additional info that should accompany this thread and code reading info. It's a 169 page pdf document that covers the codes for Mercedes models from 1988 to 1998. I guess I'm hoping this thread will evolve into a sticky or DIY link.

Edit: Go to the second post of the link below for the pdf attachment.

http://www.mbworld.org/forums/e-class-w124/323472-w124-fault-codes.html

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95 E320 Cabriolet, 169K