ABC on 2001 CL600 (help)
Have you got a diagnostics tool of any sort? If not then good idea to get one if you have any old Mercedes as they love to invent new faults on a weekly basis sometimes.
It's about £120 for the Foxwell tool which does pretty much everything. You have to buy it with the Mercedes codes already loaded and then if you get a different car later you can add new packages to cover other makes.
If the pump has an issue then the system pressure will say zero in the diagnostics info. i.e. no pressure because the pump isn't running.
Dare I say it, it's not an especially complicated system once you're aware of all the components, where they are and what they do.
You need to provide more info about your issue to have any chance of any more detailed help.
There are two valve bodies, one in the back, which is easy to find, and one in the front left. Have to take the panels around the wheel off to get to it.







