---
active: true
derived: false
header: 'Holding the parking brake at standstill'
level: 1.1
normative: true
reviewed: null
links:
  - SG-001
asil: D
---

# SYS-001: Holding the parking brake at standstill

When the parking brake is engaged and the vehicle is at a standstill, the EPB system must maintain the mechanical clamping force on both rear callipers until a release is explicitly requested. Safety goal: SG-001.

**Verification:** SiL test with up/down grade scenarios, clamping force measurement.