Update on this. The problem is caused by changing the Collision Preset of the car body (wich is needed in order for the physics to work). Leaving it by default on NoCollision makes the wheels spawn in 0,0,0 with the proper relative location, but the physics does not work anymore.
Edit: Here are pics to describe the problem. Notice how the prints, once the wheels are in ‘correct’ (wich means attached to the car) position no longer indicates X=140 Y=80 Z=22.282…
