Dodge Charger 392 SRT Hellcat 2017 Owner's Manual page 100

98 UNDERSTANDING THE FEATURES OF YOUR VEHICLE
Overtaking Traffic
If you pass another vehicle slowly (with a relative speed of
less than 16 mph (25 km/h) and the vehicle remains in the
blind spot for approximately 1.5 seconds, the warning light
will be illuminated. If the difference in speed between the
two vehicles is greater than 16 mph (25 km/h), the warning
light will not illuminate.
Overtaking/Approaching
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.
Overtaking/Passing