Comparing the old & new LEGO Technic 42129 Mercedes-Benz Zetros + rear axle crack test reloaded

The LEGO Technic 42129 4x4 Mercedes-Benz Zetros Trial Truck was released last year, and in December an updated manual popped up online with some changes in the build and the new Technic hub with screws. That version cannot be bought ever since, but I decided to build it and compare it to the original to see what changed.

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[CraigH]

I really appreciate your frank and honest reviews. Some channels are simply "fanbois" and it seems like their goal is to make Lego like then enough to keep sending them future sets. I think your criticisms are constructive and fair which is why I keep coming back to watch your content!

[neonglass]

I purchased the old version and used the digital instruction. I made a list of the missing parts using ones from my inventory. I then called customer service. After a little checking they told me that, yes there was an update and they would send me the new parts and a copy of the new manual. They mentioned that the Australia site had the latest instructions. Not sure if that's still true. I was very happy with the customer service on the issue.

[janekmorel]

I have no plans regarding the Zetros, but I like the strategically placed castle and heli on the shelf. :)

[Kelkschiz]

Indeed, when I buy a set these days, I only buy them for the parts. I bought two of these recently, but both had the old hub.

[Maksymmus]

You are right about "no communication about the changes" and "no indication of different versions" and it's really bad. When I chose it in the online store, I saw different 42129 sets with slightly different prices, but I thought that these were just different suppliers, I did not think to compare the number of parts. Already after I bought it I found out about the problems with the doors and the rear axle and from the very beginning I used the simple but very effective recommendations of Egor from RM8 BrickGarage and there were no problems with the crunch. Much later I heard about the existence of a new version and now when I watched your video I was glad that I had the old one because my bluetooth hub without screws)) thanks for your video!

[bachbui]

5:15 nice easter eggs for us to notice

[cocojo]

I love this dude this dude makes my day

[IvanForpatril]

5:14 I spy with my little eye something beginning with an A :)
Can't wait for a review of that

[miketechnic.]

Thanks RacingBrick for this comparison of the old and the new version of the lego 42129, I can't wait to see the lego reviews: 10305, 42145, 42144 and above all of 10497
You are number 1 RacingBrick for your amazing reviews of the technic, icons and speed champion sets

[coffeeinhandproductions]

Interesting comparison, and Lego reveal. I find it funny how most of the changes only stabilize the doors/hood while not really improving the overall performance, and actually allowing the vehicle to fall apart rather than risk any serious part breakage. Doesn't surprise me Lego would update a set and not say a word about it. I imagine the changes were made fairly recent from the initial releases based on review feedback as not to effect many buyers. Though in all fairness Lego should have seen a lot of these first release issues during there extensive structural integrity tests. Love the tease for the Airbus Helicopter. Really looking forward to your thoughts opinions on that one.

[ullcringe]

Will the new Airbus helicopter and material handler set reviews be coming soon, or are they still a ways off? Love the Technic content.
Edit: found the Airbus! Around 5:40. Castle sets are also there. I guess I answered my own question lol.

[McKrushi]

IIRC every set that pushes something like the drivetrain to its limit has a clutch gear somewhere, mainly because the weight of the model+tracks on carpet = full traction and possibly damaged parts. I do not remember any motorized and wheel-based model with a clutch. So maybe they think, that losing grip on the wheels is usually enough protection.

But nevertheless: The rear axle is not a masterpiece, but atleast after you add a second transmission to the other side of the diff it's sturdy enough I think - even if it might still come apart if you grab the wheels.

[chrisjohnstone]

I would love to hear more from you about other worthy mods on this model -- ground clearance improvement, introduction of a new gear box while keeping the torque -- a build using a piston engine, maybe a 3 axle version --

[AirBomber]

Excellent video, as an aviation enthusiast I am very much looking forward to the airbus helicopter review and got a little jolt of excitement spotting the set in the background :)

[stevenprins]

That helicopter in the back ground looks cool

[Andrew-AD]

Very interesting. I didn’t know they updated it

[Finnmarken]

I received mine and it's the old version! So happy that I got an old style hub being this late buying the Zetros!

[martincolloby]

I just purchased this set and am working on the build. Confused the heck out of me as I was following the PDF instructions in the Lego Builder app, while the paper instructions included in the set reflect what I actually have. The PDF has minor differences, but they are hard to spot if you are not expecting them. At least I know now that I am not losing my mind!

[nkende]

You really had to tease us with the castle & Airbus... 🤣Can't wait for those reviews, will you also be doing the Galaxy Explorer?

[Mocsfromscratch]

Very interesting video! I'm really excited to see your review about the LEGO Technic Airbus helicopter and the Material handler :)