The SE Countryman has a standard PostCrash iBrake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Prologue doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.
To provide maximum traction and stability on all roads, Full-Time Four-Wheel Drive is standard on the SE Countryman. But it costs extra on the Prologue.
The SE Countryman’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The Prologue doesn’t offer a driver alert monitor.
Both the SE Countryman and the Prologue have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, four-wheel antilock brakes, traction control, crash mitigating brakes, daytime running lights, lane departure warning systems, rear parking sensors and available front parking sensors.
For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, and its standard front crash prevention system, the Insurance Institute for Highway Safety grants the SE Countryman the rating of “Top Safety Pick” for 2017, a rating granted to only 207 vehicles tested by the IIHS. The Prologue has not been tested, yet.

