Are the SIKUCONTROL trailers compatible with all Control vehicles?
Yes, the SIKUCONTROL trailers and attachments are compatible with all SIKUCONTROL vehicles. It makes no difference whether you control the vehicles with a remote control or with the SIKUCONTROL app. You must make sure that you plug the data cable of the trailer correctly into the tractor unit. Sometimes a little more force is required until you hear a clear “click”.
https://www.siku.de/en/Frequently-asked-questions/SIKUCONTROL/Are-the-SIKUCONTROL-trailers-compatible-with-all-Control-vehicles