4x4 Mercedes-Benz Zetros Trial Truck
42129-1 Technic 2021 2131 parts 2.9% repair risk Advanced
The LEGO Technic 4x4 Mercedes-Benz Zetros Trial Truck (42129-1) recreates the robust off-road vehicle with 2131 pieces, showcasing formidable engineering. This detailed model features fully independent working suspension on all four wheels, ready to tackle simulated rough terrain. Builders can open the cab doors and hood, revealing a meticulously detailed engine bay complete with a spinning radiator fan. A service hatch provides access to inspect the internal gearbox mechanisms. Unique to this Technic set is its CONTROL+ app integration, enabling precise steering and remote activation of differential locking for enhanced maneuverability. The app also offers challenges, extending the play beyond construction. This model embodies the Zetros's rugged capabilities.
Parts Inventory
| Part | Qty | LEGO price each |
|---|---|---|
![]() Technic Pin Connector Hub with 2 Perpendicular Axles 10197 | 6× | €0,18 |
![]() Technic Gear 8 Tooth [Reinforced] 10928 | 1× | €0,15 |
![]() Flag 2 x 2 Square, Flat Clip Edge [Thick Clips] 11055 | 2× | Check price → View |
![]() Flag 2 x 2 Square, Flat Clip Edge [Thick Clips] 11055 | 6× | Check price → View |
![]() Plate 3 x 3 11212 | 1× | €0,12 |
![]() Plate 3 x 3 11212 | 1× | €0,12 |
![]() Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle 11214 | 41× | €0,29 |
![]() Plate Special 1 x 2 with Pin Hole on Top 11458 | 2× | €0,10 |
![]() Slope Curved 2 x 1 No Studs [1/2 Bow] 11477 | 1× | €0,06 |
![]() Technic Beam 1 x 5 Thin with Axle Holes on Ends 11478 | 16× | €0,25 |
![]() Technic Beam 1 x 5 Thin with Axle Holes on Ends 11478 | 8× | €0,25 |
![]() Technic Panel Fairing #21 5L Small Smooth, Side B 11946 | 1× | €0,38 |
Repairability
Can you fix 4x4 Mercedes-Benz Zetros Trial Truck if a piece goes missing?
7 of the 245 part+color combinations in this set appear in 3 or fewer sets ever made. Lose one of those and a replacement is very hard to find.
Theme average
6.5%
All sets
6.7%
Hardest to replace
More Technic sets
Browse more LEGO Technic sets related to 4x4 Mercedes-Benz Zetros Trial Truck, including models from 2021 and other sets in the same theme.
Build DNA
Parts inventory insights for 4x4 Mercedes-Benz Zetros Trial Truck
2,131 pieces puts this build +228% against the average Technic set and +298% against the average 2021 release.

Vs average Technic set
Average Technic set: 649 pieces across 453 other sets.
Vs average 2021 set
Average 2021 set: 536 pieces across 471 other sets.
Color profile
Dominant color
Red
Unique parts
0.5 pieces per unique type
Repeat factor
Average pieces per unique type.
Most used part
Technic Pin with Friction Ridges Lengthwise with No Center Slots
348xResults are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.
This site is not affiliated with or endorsed by the LEGO Group.




![Technic Gear 8 Tooth [Reinforced]](https://cdn.rebrickable.com/media/parts/elements/6012451.jpg)
![Flag 2 x 2 Square, Flat Clip Edge [Thick Clips]](https://cdn.rebrickable.com/media/parts/elements/6011814.jpg)
![Flag 2 x 2 Square, Flat Clip Edge [Thick Clips]](https://cdn.rebrickable.com/media/parts/elements/6011794.jpg)




![Slope Curved 2 x 1 No Studs [1/2 Bow]](https://cdn.rebrickable.com/media/parts/elements/6047276.jpg)


