Front impact
Structures in the dashboard presented a potential hazard to the driver's knees and femurs.

Side impact
The B-Class scored maximum points for its performance in the side impact and pole tests.

Child-protection
A child-seat recognition system is available as an option from Mercedes which automatically disables the airbag for the front passnger's seating position. The cars tested by Euro NCAP were not equipped with the system as it is not standard equipment. Without the system fitted, the airbag cannot be disabled and a rearward-facing child restraint should not be used in the front passenger seat. The label warning against such use was not permanently attached and did not meet Euro NCAP's requirements. The presence of ISOFIX anchorages in the rear outboard seats was not clearly indicated.

Pedestrian protection
The bumper scored maximum points for the protection it offered to the lower legs of pedestrians. However, the protection offered by the front edge of the bonnet to pedestrians' legs and by the bonnet surface to their heads was rated predominantly as poor.