Thank you for your replies, Yes the car has OBDII but it will not work for ABS ASR systems. ABS ASR Lights are on together wire harness is good I checked them all .I suspect the EA but want to be sure first.
I have been looking at mercedes diagnostic multiplexers on ebay in the $100 to $200 made in china, they hook up to your lap top and can go into The other systems that OBDII can not look at on my car.
An EA is an expensive part.

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88 W124 3.0
96 R129 119eng
06 ML350
98 ML320 sold
02 CLK55 amg