LEGO Technic 42129 4x4 Mercedes-Benz Zetros Trial Truck

Set 42129, “4x4 Mercedes-Benz Zetros Trial Truck”, represents a Mercedes-Benz off-road trial truck in the LEGO Technic theme.

This model brings a Mercedes-Benz Zetros trial truck into the LEGO Technic range. It belongs to the part of the theme focused on recognizable real-world vehicles and machines, where the build is shaped by structure, vehicle form and mechanical presentation rather than character-based storytelling.

Its content is centered on the truck itself, with a Technic-style chassis, bodywork and structural assemblies intended to suggest a heavy off-road vehicle. The building experience is therefore about beams, connections and functional model design, not about figure-scale interiors or scene accessories.

It suits Technic fans interested in licensed trucks, utility vehicles and models that can be displayed as well as handled. In a Technic collection, it sits closer to realistic heavy vehicles than to racing cars or fantasy subjects, offering a Mercedes-Benz truck as its main point of identity.

Inventory of set 42129

The inventory of set 42129 lists 2,131 pieces, spare parts excluded: 245 different lots (one shape in one color) for 185 part shapes. The box also contains 30 spare parts, for small elements that are easy to lose.

Colors of set 42129

Main color: black, making up 40% of the parts, followed by dark bluish gray (19%) and light bluish gray (15%).

Part types

Most common parts in set 42129

170 of the 185 part shapes in this set have their own page on Setopedia, with their colors, element numbers and the other sets that use them. See all LEGO parts

Exclusive parts in set 42129

3 part shapes in set 42129 appear in no other set in the catalog, most often printed elements, stickers or molds specific to the model. If one gets lost, you will need to look for it individually, for example on BrickLink, rather than in another set.

Rebuilding set 42129 from another set

Share of the parts of set 42129 found in each of these similarly sized sets, counting shape, colour and quantity:

Set 42172 McLaren P1 supplies 62% of them: enough to build a good part of the model before filling in the rest piece by piece.

Size of set 42129 within its line

With 2,131 pieces, set 42129 ranks #22 out of 443 Technic sets in our database, which have an average of 658 parts. Among the 519 sets released in 2021, it ranks #19. That is 3.2 times the average Technic set size.