Arocs SLT - Merca Truck




You are purchasing a PDF instructions with parts list and ordering code for the selected model

Arocs - SLT
This is an alternate model for the
42043 Mercedes-Benz Arocs 3245

Details of the model:

- A high-quality engineering model for fans and collectors
- Total number of components required - 2876 bricks
- Dimension of model B / T / H = 17,7 / 45,2 / 23,8 cm

Functions - electric:
- Drive forward - backward
- Steering left - right

Functions - mechanical:
- Four-axle suspension
- Doors for opening
- Opening the side boxes
- Attaching or unhooking to the saddle

The parts list have been optimized for quantity, color and availability.


With any instruction you get an XML list for the Custom Model so you can order with just a few click's all the required parts. The list can easily (automatically) added! You savetime and effort, as well as shipping costs! Of course you canbuild modelsin any quantity.For each model you will receive a Excel file, in which all parts you will need are listed with photo and number.

More Informations on

Login to hide ads!


Name Arocs SLT - Merca Truck
Designed 2017
Inventory 2882 parts
Theme Technic


  • 1 year, 5 months ago nigel1975 Level 24 PRO
    I just started building the 'Custom Arocs SLT RC Low Boy Trailer', which is turning out to be quite heavy without any load. I'm wondering whether the 2x XL motors are enough to drive both the Arocs and the trailer (and the load e.g. Volvo wheel loader)? Does anyone have any experience in the build? Should I plan to change gear ratios, possibly increase to 4x XL motors (if even possible, I haven't bought the Arocs instructions yet)
    • 1 year, 5 months ago Level 16 Designed this MOC DESIGNER
      The model has 2 xl engines and 2 battery boxes. this ensures proper power. To date, no customer has said anything to the contrary. if you want to build 4 xl engines, you also have to use the V2 reciever, otherwise the power will not reach the engines. regards
      • 1 year, 4 months ago nigel1975 Level 24 PRO
        The Arocs SLT works really well as built in the instructions. The issue I have currently is that when I add the Low Boy Trailer (with no load) the knob wheels that provide drive are slipping across each other and the motor mounting starts pulling itself apart. I tried switching to the PF speed remote control but had the same problem even when applying minimal power, the knob wheels are slipping because of the combined weight. Do you have any suggestion on how to gear down in order to pull the low boy trailer?

        PS. For future revisions, page 29, step 9 there is a recurring error,  a 'Technic Axle and Pin Connector Perpendicular' is added in substep #3, but then disappears through step 12.
      • 1 year, 4 months ago nigel1975 Level 24 PRO
        Some additional comments on instructions:
        - pg158 step 6 & pg159 step 6, there is a missing ''Technic axle 4'' from the parts
        - pg161 ''Technic axle 3'' with stud does not have a valid connection to the ''Technic half bush'', as shown it is not possible. Not sure if this is due to a mold variation on ''Technic Panel 3 X 11 x 1''

        Also the parts list here on Rebrickable (2882) does not match the parts list in the instructions (2876). I haven't cross checked entire list but the Rebrickable list does have missing parts e.g. ''Plate 2 x 2 x 0.667 with Two Studs On Side and Two Raised'' is missing in both light bluish grey and black.
        • 1 year, 4 months ago Level 16 Designed this MOC DESIGNER
          thanks also for this, may be that he has forgotten in the acquisition or not found. we always generate our own codes ... was something wrong with the assembly or was it left?
    • 1 year, 4 months ago nigel1975 Level 24 PRO
      Thanks CustomBricks for putting together the instructions for a very nice MOC. I deviated from the white/blue for a red/black theme as I had more available parts that way, plus it follows same color scheme as the lowboy trailer. I also avoided quite a few parts that are rare/expensive, working out alternatives for my version that don't detract from the original MOC.

      It really is a nice looking MOC now finished. I did find some parts of the build a little frustrating as some steps are a bit finicky and quite often sections would fall apart - especially when working on the front and interior of the truck. Working with my red/black scheme I also had to plan ahead to see if I would have enough of the color to complete a section, swapping with alternatives where parts were more or less hidden.

      Now complete its a certainly a great static model to look at and the functions kind of work as expected when there is no trailer. One area that could benefit from some modification are the steering axles. The doors need an additional locking mechanism, they tend to swing open when steering the truck :-) Picking the truck up and moving it around requires some care as some sections detach very easily. These are not complaints, just things to consider when building.

      As mentioned previously I also built the lowboy trailer, the Arocs really struggles to move with it attached. The motor section would need additional strengthening as the speed of the two motors tend to cause the knob wheels to slip and force apart from each other, which also tends to pull the structure apart. Gearing down is needed to manage the load on the motor, to get the truck/trailer combo moving.

      I will upload some photos once I have an area setup for photography of the truck/trailer combo, which is about 6ft in length! 
      • 1 year, 4 months ago Level 16 Designed this MOC DESIGNER
        Thanks for the great pictures! I am revising in a Mammoet version, I will reinforce the drive axle (knob wheels)! Thank you for your detailed description!
        • 8 months, 1 week ago curakar Level 7
          hello...I just started building you did you reinforce the drive axle?
          • 8 months, 1 week ago Level 16 Designed this MOC DESIGNER
            ello, in August-September, there will be new Farbvaianten. We have made the engine even more stable. There are only 2 new components. A 3x3 T-shape and a 2x4-beam. I'll upload 2 pictures ...

            • 8 months ago curakar Level 7
              This is a good solution, but I do not think this will fix the problem of the drive axle slipng out.....Also I do think gearing dawn is needed...Any way this is a good MOC.. I Will weit for some new improvements
              • 8 months ago Level 16 Designed this MOC DESIGNER
                please use the powerfunctions 64227c01
                • 7 months, 2 weeks ago curakar Level 7
                  A did exactly acording to the plans and the MOC still do not work....rebuild it 3 thimes whith the new improvements....any way its more a static model reather then a fuctional one...
  • 2 years, 3 months ago gerhard_pichler Level 5
    I'm not sure where the mistake is (didn't start building yet), but the part list here is different to the one provided in the instructions. Same for MOC-10554 (Trailer).
  • 2 years, 7 months ago MysteriousRJC Level 7
    colours remind me of a transformer i had as a kid, nice job
  • 2 years, 10 months ago jamesemwhite Level 6

    Fantastic model, can this model be built with out the power functions and hand of god steering?

    • 2 years, 10 months ago DJ Manyak Şey! Level 5
      I think no. But you can build this without electric parts. And work on HOG steering maybe?
  • 2 years, 11 months ago Alfaman159 Level 2
    Hi.. I have a spare Arocs set.. Is that all I need to build this great looking truck!?
    • 2 years, 11 months ago Level 16 Designed this MOC DESIGNER
      Hello, in our guide you also get an xml code. So you can create a wanted-list on bricklink. And yes, they are all parts. We have modified the model, optimized parts and adapted the instructions. You can now build the illustrated model 1 to 1. Regards
    • 2 years, 11 months ago Nathan Level 28 Site Admin ADMIN
      You can compare this MOC with the Arocs on the Compare Sets page.
to your account to add or reply to comments.
Already have some of the parts? Use the Build this MOC page to only show the parts you are missing.
Create an account to change the default filters used.

Waiting for Inventory to load

Building Instructions For Sale

This is a Premium MOC, and the instructions to build it are being sold by the designer ( for €24.90

You will receive building instructions of type PDF - Computer Images from the designer once you have organised payment with them.

Help Guide - BI File Types