LEGO Technic 42129 4x4 Mercedes-Benz Zetros Trial Truck detailed building review & test

[@Pales27]

It worths about 230€ in my opinion. For 300€ i want to see frontal differential lock, and 3 speed gearbox too.

[@fuchs_1053]

yes

[@adrianprepelita8683]

Maybe the next set will have a differential lock and 2-3 speed gearbox, but in this case, it will cost $350)

[@Hide_and_Tweak]

But, front diff locks are much more complicated, and it would probably have to be larger to make fit the extra parts needed

[@rayproductionsbackupchanne3862]

try to look at some of "cada" models they make amazing models aswel

[@the_dork77]

And pistons

[@creamyhummus]

The AR feature is extremely cool. Understanding how things work is one of the most effective ways to learn, and it's totally on-brand with Technic and Lego in general. Well done.

[@VariGames2004]

The intro does it for me, it's just so good.

[@jjones2582]

I like the idea of that locking differential. It would be nice to see something with more clearance like maybe a 4x4 buggy with full wishbone suspension on all four wheels.

[@adrianprepelita8683]

I actually find this to be the best Control+ set by so far, and I like how it looks, but the price is just too much. We already had a gearbox, now a dif, lock, so what's next? I think Lego should significantly improve these two functions in future sets and, maybe, add some speed to the models. Only in this case, the $300 price, will be justified.

[@andreaswiesheu2240]

that price will never be justified... the set needs more speed, more steering angle, less sticker, better doors, a hooed that stays closed, at least 3 axels and then, maybe, he is 200 dollar worth...

[@nielsdebakker3283]

@@andreaswiesheu2240 wrong, trail is not about speed.

[@andreaswiesheu2240]

@@nielsdebakker3283 sure, but in the end it isya toy and for that it needs norexspeed

[@rince5598]

I'm new to your channel and really love the way you review the building process - not the speed build but a detailed explanation how certain parts of the set work and connect with each other. Speaking of the set itself, I think some other reviewers are too harsh on it, mostly because of the price. I think it's pretty good. Though I personally prefer sets with one motor and distribution gearbox with lots of gears. Hope Lego hasn't stop making them.

[@16gero95]

Wow. It can drive straight. Totally worth 300€

[@ThatBoyGeremy]

I prefer the tow truck but this is still anyway a good lego set!

[@TJMiton]

tow truck is a miles better set :)

[@ThatBoyGeremy]

@@TJMiton yes, sure

[@sviatoslavyakobchuk2702]

15:50 try to drive in reverse (backwards) to test difference in turning radius with opened or locked differential. It should have more effect.

[@adrianprepelita8683]

Talking about prices - I remember when 42030 came out, and for some reason, it was not selling in our country. So I had to order it with international shipping and pay an extra $60 for it, but I didn't care about that, because I just fell in love with the set. Therefore, it is more a matter of taste, people who like this set will buy it even for $300.

[@alisandhu4909]

I'm a brand new subscriber,but am so happy I found this channel. I can't wait for the ford f-150 raptor

[@Ziontastic]

What I like in all your review is the detailed explanation of the build for the complex parts like locked diff and how the mechanism works. I hope you do some modification for this like the 42099. Thanks for your reviews keep it coming! Please make this a beast!

[@Tapitus-totalus]

10:14 between the 2 gray horizontal half beams on the left side, the right side is correct but I see you noticed it later :)

[@janos5555]

I have just noticed that europeans are getting ripped of In Germany I paid 170€ for the Crawler 220€ for the Volvo 170€ for the 8043 Now I am supposed to pay 300€ for the new Zetros.

[@SkylineGTRFreak]

keep in mind that the US price of 299.99$ is before taxes. In fact, 300€ is still slightly less than the 275GPB or 500 AUD

[@janos5555]

@@SkylineGTRFreak They give you the price without taxes. This must be annoying

[@octavianlacatusu9637]

If it makes you feel any better, the Zetros costs nearly $450 (with tax) in Canada. That's an insane amount of money for what we're getting in return.

[@WimvdBrink]

254 on pre-sale in The Netherlands..

[@saatenvielfalt]

Such a wonderful, entertaining and detailed video! Thank you so much

[@plainjane34]

Very useful and thorough review. I especially appreciate the humor. Very entertaining.

[@R0Sch88]

Excellent review, as always. I like how the Zetros turned out, the only thing I dislike are the wide tractor tires, but with the usual 30% discount on Technic, I will get it for sure. Seeing the history of Milan's sets so far I see a year by year improvement in build complexity, although so far his Land Rover is probably his best creation. For me 1 motorized set per wave would be enough as it was the case before 2018. The rest can be old-school manually driven Technic for a lower budget. And a B-model would also be nice.

[@Hide_and_Tweak]

With some extra functions like a winch or something, it would be more decent for the price. But I'm looking forward to build it ! just got it this morning

[@MTBer193]

Good for you i barely got the jeep wrangler and my mom just said that i can forget about that 😫😔

[@Hide_and_Tweak]

@@MTBer193 Yeah, but I'm 32 years old and I work full time. This cost about what I make in 3-4 days of work... so yeah I understand your mom, that's kind of a 500$ toy

[@JustCallMePCra]

It's a fund build. I am anticipating the D11! I can not wait. I'm good friends with the guy at my local Lego shop and he's gonna hold one for me in case it sells fast first day!

[@gamingbricks8604]

This is crazy. I recently purchased this set, and It came with different shock absorbers that are more squishy. They don’t have a compressed part in the middle. 2023 Jan set.

[@b3for354]

19:10 A better comparison would be the 42114, it costs 50€ less and has more parts and an exclusive motor.

[@adrianprepelita8683]

42114 is also slow, and it can climb a carpet only at 1 speed, so the rest two are useless. At least this one is a good trial. But I agree, at a $250 point, Zentros would be a greater set.

[@jlai036]

For the price I feel it's more an adults lego model set rather than one for kids. For adults, it should come with working engine, steering, transmission, larger wheels and ground clearance. For the price you can buy two 42128 with more functions.

[@mobydoux]

Overpriced and very slow but with a 30% discount (that made me buy this set) it can be worth it. This is a model made for climbing and off-road. The truck is very powerful and the differential lock works very well : you really feel the difference. If you buy it for another purpose like racing, drinving or playing on a construction site, you will be disapointed.

[@thepope9076]

I really like this set. For me it’s between the Land Rover Defender and this.

[@The_RC_Dude]

12:56 The poor Off-Road Buggy, I guess it will never live its fart sounds down...😂😂

[@RacingBrick]

Never forget, never forgive

[@prodkerstii]

I literally got the set today and this is on my recommended. Can’t wait to put it together

[@BrandonMeyer1641]

This set is a great one to build upon. After I had my gun with original set I would modify the chassis so the front and rear differential are attached to the frame and add a longer travel independent suspension front and rear. Add larger tires and longer steering rack for tighter turning radius and you would have a beast. This set has a lot of cool stuff going on but it is killed by the lackluster ground clearance and poor turn radius.

[@stockholm1752]

13:28 That’s a cool feature. They should bring that to other LEGO sets. But it doesn’t justify the cost of this one. Speed tip: take out the motors and push it.

[@TomKazutara]

20:05 well yeah, but at least the 4x4 came with an remote control

[@Kelkschiz]

Interesting set. Finally TLG made an off-road vehicle with some torque and climbing potential!

[@antonnule4208]

I just started watching the video,and I already enjoy it. Very informative. Thank you. Greetings from Germany

[@markomitrovic3372]

Looks good, keep up the good work, man

[@eliovarela4855]

Great review! Thank you Balazs!

[@TheYamakasi007]

Honestly i prefer 42099. At least with few small mods we can call it crawler. 42099 has smaller turn angel - not like titanic. Better suspension and easily to mod. I really was waiting for 42129 but 42099 is more robust. Maybe next set will be better. 42099 is to low to call it trail truck and way to expensive. Thanks for great review.

[@jliu1596]

My guess is the hub with screws will be in a future set, such as 42131. Ideally, it would be one where the battery cover is accessible from the bottom, like 42109 and 42124, as this makes it easier to remove the screws, and the screws would prevent the batteries from falling out onto the ground.

[@robl39]

I wasn’t going to get this set but your videos made me change my mind and I ended up buying it. I love your channel!

[@thomaswyatt199]

Lego overall has just gotten overly expensive since the pandmic with more adults getting into lego the prices have increased and lego having record breaking sales. I remember when technic sets had the best price per piece only a year ago.

[@pengfeiduan4543]

Pmm I’m Eva

[@Emppu_T.]

Harder to make plastic when people are forced to stay home.

[@McKrushi]

Good review, I enjoyed watching, but I completely understand the discussion about the pricing. Yes, RC models where always (too) expensive (I always point at the 42030 in such diskussions) . But in direct comparision to the 42114, you have a reson to start scratching your head when you compair the 42099 and 42129... But I do not think it's fair to reduce this model to its price. From my view, it is the best offroad/crawling model Lego has ever created. Besides it has some flaws, like every model has. Overall it's great and you can see the effort, that the designer put into this to solve the unsolveable problem of combining Lego-toy rules and powerfull trucks immediately. 7:40 42114 has a functional fake engine - if that type of fake engine counts.

[@RacingBrick]

I seem to forget about 42114 most of the time, completely missed that it had a fake engine :)

[@flyguy466]

Wow amazing high quality and in depth review! Great job!

[@robertsteinbeiss8478]

It is one of the better tries by Lego, but as you said, a kids toy for 300€ vs. a Technic Fan Model. The one does not have the money, the other not the fun. Your choice.

[@pybricks]

This would be fun to drive with the Powered Up remote, using the center button to toggle the differential lock.

[@RacingBrick]

Soon ;)

[@bachint80]

What a quality build!!!

[@MAL-Collector]

It's on sale here in Denmark for under halv price! 130 euros. What a steal!

[@SimpleSimonSS]

I recently bought this set on a sale, loved building it and it looks good. Trouble is that it is not particularly exciting to drive, not helped by the fact it easily gets stuck when driving it in my garden due to the low front axel. This is one kit that I do not regret buying, but mostly for the parts, I will likely be breaking it down and using the parts to experiment with a new build of my own since we can use (the over complicated) Powered up app to make our own controls.

[@klemmsteinFrank]

Kann man größere Reifen benutzen wenn ja welche.Wegen mehr Bodenfreiheit.

[@akoshorvath-risko5838]

Once, I left a 20 tooth gear out of my Technic Arocs. It was supposed to go right in the center gearbox, so I didn't take it apart. The compromise was that it can't extend it outriggers.

[@stormycatmink]

They need to have that augmented reality for each step, to show you if you missed a piece!

[@bonnalishdiecast5089]

First 27 seconds of the video were kinda hilarious ngl

[@DellanMarius-rz8nt]

Thank you for the information my son loves Legos I'm gonna give that for Xmas

[@antonpotgieter2710]

The price comparison was interesting. It's still up there, but not quite as overpriced as others have alluded to. I hope LEGO take your hint about including a proportional physical controller seriously.

[@SebastianFischer]

Compared with 42114, which comes with poweredup motors, has more parts and has a price of 250 €, the set is quite expensive. And both have licences.

[@grohl666]

Nice review of the most powerful Technic set.

[@gemeinerrainer7069]

Very good video, but was is the Moc on the right sid3 at 18:42? Is it your own creation or do you know anything about it? It looks very interesting

[@RacingBrick]

It's not my MOC, and of course I know a thing or two about it :D It will definitely get more screen time around here as well, but until then you can take a look at the designer's channel here - kzbin.info

[@gemeinerrainer7069]

@@RacingBrick thank you very much!!

[@benh2517]

Absolutely awesome video! Please keep up the great work man!!!

[@WimvdBrink]

Dropped in here because it was on sale on pre-sale at my preferred Lego dealer and wanted to know if its worth buying, and your video convinced me so it's a good one, I like the funny remarks but also clear explanation, not all happy comments so I believe you are truthful in your comments about the set, also mentioning the complaints of others and telling your opinion about it is a very good pro review style. I do think it's a bit overpriced but don't want to wait for price drops ;-) subscribed to your channel and hope to see more reviews like this :-)

[@legotechnic15YT]

400 bucks canadian thats a crazy price. i think i will wait fora price drop

[@pompapompowski9527]

Very impresive and very nice video!

[@livinsite1]

The inner functions is such an eye opener for kids, dont you think?

[@oscarvilche4431]

I want this truck. I don't like that it's $300 but it is justified. Electronic systems/motors are expensive, it's just how it is. The price count is good and the look is fantastic. Only some slight additions to the bodywork would help it to be more sturdy. I do wonder though if there will ever be a lego RC set that 1) has the portal axles, and 2) is more capable for actual off road use. We shall see

[@acceleracer4]

I got this set for Christmas building it looks like a headache but can't wait

[@BetriebAnin]

If you’re mad that it doesn’t preform well, bruv, it’s a toy. You can’t really get great crawling performance from plastic shocks and those motors. If you want a real crawler, get a real crawler like an SCX10 or TRX4. I love this thing, and it’s great at what it is made for,and hardcore crawling isn’t one of those.

[@PranavRajagopal]

This set is really cool!

[@saga55797]

Just got it for 126 pounds in amazon. Looking forward to building it as this will be my return to lego and technic for me since the 911 gt3 rs back in 2016.

[@soopafamicom]

A very good example of real world physics and engineering translated into lego. I can see loads of idiots complaining about such things but who cares if they can't understand that steering and other aspects will be different with diffs locked.

[@JB-yu1vv]

I quite miss the differential lock of the front axle, i mean what is the sense of locking differential when you can't lock all of them

[@qdaniele97]

Being able to also lock the front differential would be useful only in case all the wheels except one at the front loose contact with the groud. A pretty uncommon situation where (at least in real life) having the single front tire on the ground still moving wouldn't be of much help anycase.

[@philp8872]

@@qdaniele97 Yes, but real trial trucks do of course have all diffs lockable. Some offroaders also, like Mercedes G, Jeep Wrangler Rubicon, on some heavy duty Toyota Landcruisers they are at least optional. And for most other serious 4x4s, like the old Land Rover Defender, Nissan Patrol, Suzukis, Ladas and so on they are available as aftermarket parts. BTW, it´s not just about having a single wheel on the ground, but rather having a single wheel having enough grip on loose terrain to keep the vehicle moving. In competition trial situations this is not uncommon at all. But the thing with this set is that it has very poor axle ground clearance, very poor turning radius and a lot of weight in the front, so a locking front diff would really help!

[@redacted8567]

Built mine yesterday, is it normal for only one of the rear wheels to spin when the truck is held up off the ground? Because it seems like the right rear wheel is the only one getting any power to it. The other one is completely static unless I lock the differential. I’m worried that when it’s driving with the unlocked diff it’s forcing the motor, and wearing it out in the process.

Great set. Surely I'm getting one!

[@moditorplayz]

been waiting for this!

[@DaveBais]

Dali subwoofer! Now thats impressive!

[@Kalgani]

Why did you not compare it against something from CaDa or Mould King?

[@RacingBrick]

Because I don't have sets from them?

[@Kalgani]

But that is the real competition, not other Lego sets!

[@RacingBrick]

Then go ahead, feel free to compare :)

[@maszkalman3676]

Not that the lego version's proportions are all wrong to the original but in this scale it's useless to any terrain other than some grass and little gravel it can't climp over basically any bigger rocks or even ditches... or some scrunched up carpet.

[@CharloBagis]

I will probably get this, but will wait for the price to go down a bit. Thanks for the excellent review Balazs 👍

[@legotechnic15YT]

Thank you for the video it was so helpful i have been watching your videos for over a year now and i love them thanks.

[@philmanley489]

I read the latest build of 42129 has 2129 parts (not 2110). And these extra parts are used to secure the doors and bonnet from opening on inclines. So I am told!

[@RacingBrick]

I have a video about this situation - kzbin.info/www/bejne/pn3Cqq2nl7SWntk

[@haoyu2609]

Amazing video! I have a question, When differential is locked, is the rear wheel slower than the front wheel? Thanks!

[@techni-cmate4746]

Good review with good balance promotion Btw, what's that red Truck (18:42 )? Is that your Moc? Do you have video of it? Or B.I. as well? Tnx

[@superemeraldproductions]

They should definitely add the AR feature to the 6x6 Volvo Articulated Hauler soon

[@AlexElectricSound]

I love cars and i love your channel 😎🤩😊🚘

[@DelLego]

Your reviews are truly one of a kind! I genuinely can't find other reviews that also covers how all the mechanism works inside. I have watched ALL your detailed building review!! It's a shame you only do it on the newer reviews since I would even pay to see a detailed building review of 42082 set (2018)

[@RacingBrick]

Thanks, I'm glad you like the content! It takes tons of time to make these building reviews compared to the regular speed builds, unfortunately I really don't have resources to do this for older sets.

[@DelLego]

@@RacingBrick Truly the time investment you put into your work really shows! But yeah I figure it doesn't really make sense doing it for the older sets with much less interest on them. There's a ton of speed builds out there, even all other big youtubers are doing it and it really doesn't add much information (I always skip speed builds). So your build really does stands out from the rest of them. I hope you don't get tired of doing it and the huge time investment really pays off to your channel growth. One idea to maybe "improve" the build is instead of a jump-cut to the next interesting part of the build, you can do a "mini speed build" between the interesting parts that you want to point out. So you have the best of both worlds. But the trade off is the video gets longer. Just an idea tho Anyway really appreciate the reviews and looking forward to your mods of 42128 and 42129!

[@BreaksBee]

there is part on the bag 2 part where you need to put the red and yelllow cross bars like the holes need to be seen from the top is that really necessary like i don't wanna go back after we've done the entirety of book 4

[@iceagebaby1307]

7:38 there’s already a control+ set with a fake engine, the 42114 Volvo hauler

[@RacingBrick]

Yep, forgot that one.

[@rudycercopely8822]

I just built it, on the app when it’s in the 4WD section it only has 2 wheels that rotate while the other section I have no tires rotating

[@sastarsa3753]

Hi,i finished the set and go for a run first time but im hearing creeking or sound from white part when diff lock is on and off,is it normal?

[@guiagaston7273]

"Well balanced set" as long as you hate turns.

[@manfazel2101]

The volvo already had a fake piston engine btw

[@Lytech9116]

great and detailed review, keep up the good work !

[@BRIAN-dm4ps]

Great review hope you do more

[@mahoneys64]

I fixed the hood problem with one of those tan colored 3/4 pins, they give you an extra in one of the bags.

[@mauricefien1267]

Great review. Great set. Thanx!

[@republicservicesoflosangel7954]

Compare it to the arocs and unimog

[@theman3055]

Greeting from Denmark, very cool set

[@Dadudi]

21:37 poor duck 😂

[@gieselats]

Really good review. You explained most everything in depth. I enjoyed your video. Unfortunately I don‘t have the money to buy such expensive sets. But I am glad that there people who can afford these sets. Keep up the good work.

[@eshokorat2994]

Maaan. I wish I wasn't broke otherwise I would have gotten this and the tow truck. Looking forward to the f150 raptor

[@ronnie2031]

Hello Balazs! Unfortunatelly my set came with the screws on th hub☹. So difficult to replace batteries...

[@xaytana]

Wait, so a lightsaber bar (or any minifig bar-like weapon piece) through a stud-pin, while said stud-pin in in a pin hole, isn't an illegal building technique? I always thought Lego would consider it as one, as the double friction fit would be fairly stressful on the stud-pin. As for the proportions in comparisons to the drawing from Mercedes, it looks like the cab assembly needs to be about one stud forward compared to the front wheel, and this also means the rear of the cab would need to be extended by one stud. The frame of the truck also isn't extended properly, the Lego model has nothing behind the rear diff housing; and the lack of the trailer hitch is a slight disappointment. Bed length is whatever, but is there any real reason why Lego shortened it? The underbelly components also seem entirely out of place compared to the actual truck, both in position and count; the domed pieces behind the ladders, there's supposed to be 3 of them when the model only has 2. There's also no real reason for the body itself to be lifted from the frame of the truck, it just makes it look odd. As for the 'lifted body' portion, I'm surprised Lego didn't design it true to the original and include portal axles. Mercedes themselves uses portal axles, Lego has had them in the past, I don't really understand why they didn't use them if this is meant to be a trial truck. Between the ground clearance issue and the amount of pieces that can be opened or knocked off, this is definitely a shelf set.

[@philfromcharlotte]

The green pieces that go around the truck bed. Are they bright green or regular green? Thank you. Phil

[@RacingBrick]

Bright green

[@hellslayer9638]

man , this is my type of fun time , build it experiment with weights and drive it too , really good man , 😀

[@GamerOcto]

Sweet, gonna get both But I wanna see if I can try and get it on clearance from somewhere

[@giobaxNXT]

Great review and good video, I really enjoy your Channel. Thank you

[@paawian]

Bro, you are testing central differential lock. It is actually not supposed to make a significant difference on turning radius since you only lock power difference between front and rear axle (not between left and right wheels). Big difference between rear or front drive lock and a central lock.

[@RacingBrick]

Edit: You realy made me mad with this "bro" thing, even I messed it up, so let's go over this again. The Zetros has a central and a rear axle lock, both engaged together.

[@paawian]

@@RacingBrick I didn't aim to hurt any feelings, sorry. Thanks for clarifying! It seems I didn't pay enough attention to the video :D