The Mercedes Zetros is an ultra-heavy-duty truck built for the most extreme applications, from search and rescue and exploration to military applications. Trial trucks are built to tackle off-road obstacle courses, proving their toughness through a series of grueling challenges — and that's exactly what this LEGO Technics set is built for. The Zetros Trial Truck features fully articulated suspension, opening doors, and a rotating cab for viewing internal details. The Zetros is powered by four electric motors and is controlled by the LEGO Control+ app, with a first-ever electronically-controlled locking differential.