The passenger compartment of the smart #1 remained stable in the frontal offset test. Dummy readings indicated good protection of the knees and femurs of both the driver and passenger.  smart demonstrated that a similar level of protection would be provided to occupants of different sizes and to those sitting in different positions.  Analysis of the deceleration of the impact trolley during the test, and analysis of the deformable barrier after the test, revealed that the car would be a benign impact partner in a frontal collision. In the full-width rigid barrier test, protection of the driver was good for all critical body regions of both dummies, apart from the chest of the rear passenger, protection of which was adequate.  In the side barrier impact, protection of all critical body areas was good and the smart scored maximum points in this part of the assessment.  In the more severe side pole test, protection of the chest was adequate and that of other critical parts of the body was good. Control of excursion (the extent to which a body is thrown to the other side of the vehicle when it is hit from the far side) was found to be adequate. The smart #1 has a counter-measure to mitigate against occupant to occupant injuries in such impacts.  Tests on the front seats and head restraints demonstrated good protection against whiplash injuries in the event of a rear-end collision.  A geometric analysis of the rear seats also indicated good whiplash protection.   The smart #1 has an advanced eCall system which alerts the emergency services in the event of a crash and a ‘Post-Impact Braking’ system which automatically applies the brakes to prevent secondary collisions.

Apart from the head of the 10 year dummy in the side impact, protection of which was adequate, the car provided good protection of all critical body regions of both dummies in dynamic crash tests.  The front passenger airbag can be disabled to allow a rearward-facing child restraint to be used in that seating position. All of the child restraint types for which the smart #1 is designed could be properly installed and accommodated.

Protection of the head of a struck pedestrian was predominantly good or adequate.  The bumper offered good protection to pedestrians’ legs at all test locations but protection of the pelvis was predominantly weak or poor.  The autonomous emergency braking (AEB) system of the smart can respond to vulnerable road users as well as to other vehicles.  The system performed well in tests of its response to pedestrians and cyclists, with collisions avoided in most test scenarios.

The smart’s autonomous emergency braking (AEB) system performed well in tests of its reaction to other vehicles.  A seatbelt reminder system is fitted as standard to the front and rear seats and the car is equipped with a system to detect driver fatigue.  The lane support system gently corrects the vehicle’s path if it is drifting out of lane, and also intervenes in some more critical situations.  The car uses camera-based traffic sign recognition as part of its speed assistance system.  However, that part of the system failed Euro NCAP's requirements and only the speed limiter itself was rewarded.