Built for extreme conditions, the 4x4 Mercedes-Benz Zetros Trial Truck has enough power to take on the roughest terrain. Now you can build your own LEGO Technic version of this impressive vehicle. Enjoy a challenging build process and then use the CONTROL+ app to drive the truck and operate the differential lock. Place obstacles and use the flags to map out a course. Is this impressive truck letting something stop it? Anyone who likes powerful trucks will enjoy building this LEGO Technic 4x4 Mercedes-Benz Zetros Trial Truck (42129) model. Packed with realistic features, the truck offers adults and children ages 12 and up an engaging building experience. Open the cab doors and hood. View the working suspension on all 4 wheels and open the service hatch to see the gearbox. The model has a detailed engine with rotating radiator fan. This model has a limited slip differential for the first time in LEGO Technic history. Block and unblock the differentials using the app to maneuver the truck over rough terrain. Building is just the beginning. Use the CONTROL+ app to put this impressive vehicle to the test. Use the various control screens to steer and operate the differential lock. With all the challenges and achievements in the app, this set offers many play options. - Construction toy enthusiasts will love building their own model version of the Mercedes-Benz Zetros Trial Truck. Try out all the great features using the LEGO Technic CONTROL+ app. - This LEGO Technic 4x4 Mercedes-Benz Zetros Trial Truck (42129) model is packed with authentic details, such as working suspension on all 4 wheels, a detailed gearbox and a limited-slip differential. - Features realistic design features such as racing decals and 2 fire extinguishers. Use the flags to create an obstacle course and test how the truck behaves on different types of terrain. - This is a great set for adults and children ages 12 and up who can play with it together. It's also a great toy for young LEGO builders looking for a challenging building experience. - The toy truck is approx. 21 cm high, 48 cm long and 19 cm wide. - Operates on 6 AA batteries (not included). You can easily detach the battery holder, so you can easily change the batteries when they are empty. - This app-controlled LEGO Technic truck is powered by 1 Bluetooth smart hub, 3 large motors and 1 medium motor, which are included in the set. - LEGO Technic building toys offer LEGO fans ready for a new building challenge an advanced building process. - LEGO Technic parts meet strict industry standards, making them consistent, compatible and easy to assemble and take apart – and it's been that way since 1958. - LEGO Technic parts are dropped, heated, crushed, twisted and analyzed to ensure they meet strict global safety standards.