FAILURE CITROEN XANTIA II 2.1 TD YEAR 1998

Hi, could someone help me? I can't find the information to remove the instrument cluster because of an electrical fault that's causing the ABS light to come on. This model doesn't have ABS, and the Citroën dealership is telling me I have to replace the whole thing and that the price, both for the part and the installation, is high. They didn't give me an exact price. It's not the first time I've been there, and they only advise me to trade in the car because of its age (1998). I like the model, and because of this fault and other minor ones that I'm fixing little by little by using salvage parts, I'm not going to trade it in. Thanks.

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

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