ABS light is on. Possible replacement for the module

The ABS light is on, along with the BAS and ESP. I took it to a mechanic and said it needs a new ABS module. I been looking online for an ABS module for the A160 but no luck. I'm going to check to see it have to do with any of the valves or wiring into the module. I would like to see a picture of the ABS module and a schematic of it. Also if you have a link to a seller for the module, just in case. Any suggestions or ideas will help too.