I found this on e-bay, look at this hyper-link and tell me if this is what you are talking about please and let me know. Once again I appreciate all of you and what you do to help us all on our perspective situations. LOOK AT THIS LINK BELOW:

http://cgi.ebay.com/ebaymotors/Diagnostic-code-reader-tool-Mercedes-W140-R129-S500-_W0QQcmdZViewItemQQitemZ320570087174QQptZMotorsQ5fAutomotiveQ5fTools

Thanks