ABS Brake problem 124 94 e220

[AussieBaz]

I have a major brake problem with my right front brake not working, Ive checked for pressure at Mc,that was ok- but no pressure to r front calliper, back checked pressure thru flex lines all the way back to the ABS unit and found no pressure (b fluid) coming fron 2nd top brake line ( L ) coming from ABS. all other lines ok.
In between time ive fitted new calliper kits & scimmed the disc s . Iam at the point now that I think I may require a new ABS unit..
Any bright ideas from anyone would be appreciated... Barry