So I was transformeing him back to car, when I dropped him, not very high, like AT MAX 15 centimeters.
at this moment, his fron wheels immediatelly closed together, like when you push his grill on the front. Problem being, when I tried to put his wheels back to the sides, the left wheel (right one when viewed from underneath) kept coming back into "closed" position. After examining it I foun that the black piece that is connected to the springs is loose, and does not stay well under the wheel, like on this image:

As you can see, I put a small piece of bent paper inbetween those pieces, so that the loose one doesn't come out of place, but it's only slightly effective...

