FAILURE CITROEN XANTIA II 2.1 TD YEAR 1998

Hello, could anyone help me? Do not find the data to disassemble the picture due to an electrical failure that makes the ABS light turns on. This model does not carry it and the Citroen house tells me that I must change it whole and that the price of the same, as well as its change, is high ........ They did not give me the exact price. It is not the first time that I go and only advise me the change of the car for ancient times, (year 1998). I like the model and for that failure and other minors, which I am repairing little by little, via scratch, I will not change it. Thank you

I have no problem helping you but I don't know what the picture is.

sorry, I mean the central picture of the KM, lights, revolutions.