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Old 07-12-2001, 08:23 PM
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JimF JimF is offline
'94 S500: only 793 sold!
Join Date: Mar 2001
Location: San Diego, CA
Posts: 1,925
The on/off ratio (lambda) tester can be purchased from the following link:

The FAULT CODE COUNTER (124-1921) can be had by making one yourself or buying one from this link:

Also read Steve's article in the DIY section.
Regards . . . . JimF
'94 S500 Cpe

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