The seatbelt allowed excessive forward movement in the small-overlap test, but the dummy's head was effectively protected by the front and side curtain airbags.

The Mercedes-Benz GLC has joined the Insurance Institute for Highway Safety's Top Safety Pick+ club.The midsize luxury SUV earned 'good' ratings in every crash category, with a superior-rated front crash prevention system and available 'good' headlights.

In the small-overlap impact, the seatbelt allowed excessive forward movement and the dummy's head rolled to the left. The side curtain airbag deployed, however, and effectively prevented any impact with the A-pillar.

Three different headlight ratings were given, with only the Advanced Lighting package's LED projectors worthy of top honors. The lesser LED Headlamps and Taillamps package -- still an upgrade option -- earned an 'acceptable' rating, while the base model's halogen reflectors were considered 'marginal.'

The GLC was introduced for the 2016 model year but was not tested by the IIHS until recently.