For those who do not have the Benz HHT scanner to get the digital sub code versions of the led codes, the old Snap-On ST/2500 will do the same and they are getting obsolete now , so you can see them on ebay quite often for very short $$$$$.
Good tool , but these OBD1 systems went out in '95, so for the average 124 guy , the LED readout tool is still a nice general code tool for the diyer guy..
ST2500 does do live data too....

Thank for that info , GSXR...there are still many here who do still have OBDI and the sub-code info is sometinmes just what is needed and makes the difference in a complete diagnosis...
AllData does also list both ..
Never see the HHT on ebay...wonder why????

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A Dalton