Chrysler 300 2011 Owner's Manual page 105

UNDERSTANDING THE FEATURES OF YOUR VEHICLE 103
The BSM system is designed not to issue an alert on
stationary objects such as guardrails, posts, walls, foliage,
berms, etc. However, occasionally the system may alert
on such objects. This is normal operation and your
vehicle does not require service.
3
Overtaking/Passing
Stationary Objects