Manual Lego set 42129 Technic Mercedes-Benz Zetros trial truck

Need building instructions for your Lego set 42129 Technic Mercedes-Benz Zetros trial truck? Below you can view and download the PDF building instructions for free. There are also frequently asked questions, a product rating and feedback from users to enable you to optimally use your product. If this is not the manual you want, please contact us.

Is your product defective and the manual offers no solution? Go to a Repair Café for free repair services.



Download manual in English (PDF, 129.64 MB)
(Consider the environment and only print this manual if it is really necessary)



Let us know what you think about the Lego set 42129 Technic Mercedes-Benz Zetros trial truck by leaving a product rating. Want to share your experiences with this product or ask a question? Please leave a comment at the bottom of the page.
Are you satisfied with this Lego product?
Yes No
2 votes

Frequently Asked Questions

Our support team searches for useful product information and answers to frequently asked questions. If you find an inaccuracy in our frequently asked questions, please let us know by using our contact form.

There is a Lego brick missing from my set, where can I order a spare one? Verified
Lego has a service where you can order separate bricks or contact them when a brick is missing from your set. Have a look at their website for more information.

This was helpful (3634)
How can I prevent my Lego toys from discolouring? Verified
The two biggest contributers to the discolouring of the plastic of Lego toys are long term exposure to sunlight and cigarette smoke. Try to minimise these when storing your Playmobil.

This was helpful (1229)
What is the best way to clean my Lego bricks? Verified
Lego advises to clean the bricks by hand with some water (no warmer than 40°C) and a mild detergent. Never place the bricks in a washing machine or dishwasher. Let the bricks air-dry afterwards. Electric parts can only be cleaned with dry cloth.

This was helpful (1113)
After I build a new Lego set I always have a few small pieces left. Did I forget to use them? Verified
No, many new Lego sets provide spares for the smaller pieces.

This was helpful (881)
What is the best way to apply stickers on Lego? Verified
To be able to reposition stickers it's a good idea to apply some glass cleaner on the location you want to put the sticker. When the sticker is in right spot, let it dry and it will stick.

This was helpful (783)
Can Lego and Duplo bricks be used in combination with each other? Verified
Yes, Lego and Duplo bricks are compatible. Lego bricks fit on the Duplo bricks with the hollow studs. Duplo bricks fit best on larger Lego bricks and could come loose form smaller Lego bricks.

This was helpful (706)
From what age is Lego suited to play with? Verified
Most Lego sets are suited to play with from age 4 and up, because of the small parts they include. The special Duplo theme is suited for children aged 1,5 and up. The recommended age is always mentioned on the box.

This was helpful (683)
Where can I find a part list of my Lego set? Verified
Many modern Lego instructions include a part list at the end of the booklet. In the case of multiple booklets the list might be found in the middle of the PDF.

This was helpful (596)
Where can I find the instructions for the alternative model of my Lego Technic set? Verified
We have combined the instructions for the alternative models with those of the main model. Scroll past the regular instructions to view the alternative model.

This was helpful (246)


Join the conversation about this product

Manual Lego set 42129 Technic Mercedes-Benz Zetros trial truck