DSC off permantly

[wazadaza]

Have you checked your pad depth? I had the same issue and turned out my front pads were almost metal on metal but that was on a 330i not my CSL.

[jonv]

It's not the ABS sensor or the pump (those rarely fail) ...

It's the DSC Pressure sensor - part No: 34521164458

Very common for this crap sensor to fail multiple times before it stops working.
Item 2.

Replaced part as recommended, all is fine! Huge thank you for the guidance.

Jon