[W124] ABS query

[Frank Smyth]

Hi folks
 
Been tracing the wiring on my '92 230CE to see why the ABS warning light comes on sometimes (when driving fast, especially in the wet; although it has been coming on more frequently recently). It all looks okay, and the connectors are sound. Also check the relays with an ohm-meter and they appear okay off the vehicle
 
All of the online guides to ABS I found (generic, not MB-specific) say that the next step is to read the trouble-codes from the ABS' ECU. This will report "voltage low" problems and such like
 
Can that be done on the Benz ? Would hate to just start throwing parts at the problem (relays, sensors, and then the big-money-stuff)
 
Thanks

Frank