How many pieces does the 4x4 Mercedes-Benz Zetros Trial Truck have?

Set 42129 contains 2,131 pieces across 245 unique elements. The full breakdown is listed in the parts list on this page.

Does the set include any minifigures?

No, this is a pure Technic vehicle build with no minifigures. The focus is on mechanical features such as steering, suspension and four-wheel drive.

What colours dominate the model?

Black, dark and light bluish grey and blue make up most of the build, matching the utilitarian look of the real off-road truck.

Technic

4x4 Mercedes-Benz Zetros Trial Truck

The 4x4 Mercedes-Benz Zetros Trial Truck 42129 is one of LEGO® Technic's larger 2021 models, built around the real Mercedes-Benz off-road truck. At 2,131 pieces it sits among the bigger Technic builds, aimed at builders who enjoy mechanical function over minifigures. This page lists every part and colour used in the set.

Set number: 42129
Year: 2021
Pieces: 2,131
Minifigures: 0
Theme: Technic
Different parts: 245

What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 245

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Spare parts (25)

These extra parts come with the set in case one gets lost.

Description

Modelling a real off-road truck

The Zetros is modelled on Mercedes-Benz's real off-road truck, a vehicle built for extreme terrain rather than tarmac. LEGO® Technic translates that brief into chunky, profiled tyres, generous ground clearance and a driveline built for four-wheel traction. At 2,131 pieces and 245 distinct elements, the set is large enough to reproduce the truck's boxy proportions and raised stance convincingly. Builders who enjoy seeing how a real vehicle's engineering translates into plastic will find plenty to study here, from the axle layout to the cab detailing.

A restrained, functional colour scheme

Colour plays a supporting role rather than a starring one: black, dark and light bluish grey and blue make up the bulk of the build, echoing the working-vehicle look of the real Zetros. With 245 unique parts, the palette stays tight compared with many themed Technic sets, since the emphasis sits on mechanical function rather than decoration. The parts list on this page breaks down exactly which elements appear and in which colours, useful if you're hunting for a specific piece after building or checking compatibility with another set.

Scale, build time and who it suits

At over two thousand pieces, this is a substantial build that rewards patience rather than speed, and it suits builders already comfortable with Technic's connector-and-axle logic. There are no minifigures included; the truck itself is the centrepiece, equally at home being played with or displayed once finished. Compared with smaller Technic vehicles, the Zetros gives more room for internal detail, which shows in the part count relative to its footprint. Anyone stepping up from entry-level Technic sets will find a natural next challenge here.

Reusing parts from this set

Many of the 245 element types in the Zetros are Technic staples, connectors, axles and pins, that turn up across other vehicle sets and lend themselves to custom builds. Suspension arms and steering knuckles in particular are worth keeping aside once the model is finished. Use the parts list on this page to check whether a piece from this set matches something you need elsewhere, or to confirm exactly which colour a given element comes in before combining it with another set.

FAQ

How many pieces does the 4x4 Mercedes-Benz Zetros Trial Truck have?: Set 42129 contains 2,131 pieces across 245 unique elements. The full breakdown is listed in the parts list on this page.
Does the set include any minifigures?: No, this is a pure Technic vehicle build with no minifigures. The focus is on mechanical features such as steering, suspension and four-wheel drive.
What colours dominate the model?: Black, dark and light bluish grey and blue make up most of the build, matching the utilitarian look of the real off-road truck.