Faulty ABS? How to Replace it? Mercedes-Benz W140

#DIY The symptom I had that made me replace the ABS is that breaks are locking up. ABS wasn&releasing pressure, even when I use the diagnosis tool to inspect it and perform tests. the only way I was able to diagnose this is by disconnecting the ABS plug and using the car without ABS and noticed that I get no problems at all. After I replaced the ABS and performed the brake bleed, everything was perfect and the brakes are not locking up anymore.