moin das alleine passt wohl nicht
<base>
<typeDesc>$l10n_typeDesc_trailer</typeDesc>
<filename>HW80.i3d</filename>
<size width="2.1" length="4.5" lengthOffset="1.1" />
<components maxMass="13000">
<component centerOfMass="0 0.6 -0.4" solverIterationCount="10" mass="1700"/>
<component centerOfMass="0 -0.15 0.0" solverIterationCount="10" mass="600"/>
<component solverIterationCount="10" mass="150"/>
<component solverIterationCount="10" mass="1" />
<component solverIterationCount="10" mass="1" />
<joint component1="1" component2="2" node="componentJointFront" rotLimit="0 120 0" transLimit="0 0 0" />
<joint component1="2" component2="3" node="componentJointDrawbar" rotLimit="30 0 0" transLimit="0 0 0" />
<joint component1="1" component2="4" node="component4Joint" rotLimit="12 0 0" transLimit="0 0 0" />
<joint component1="1" component2="5" node="component5Joint" rotLimit="12 0 0" transLimit="0 0 0" />
</components>
<schemaOverlay attacherJointPosition="0 0" name="IMPLEMENT" />
<mapHotspot type="TRAILER" />
</base>
dann sieht das so aus