The leaf springs are not functioning, but each wheel has a small vertical indipendent spring suspension inside the steer articulation, therefore the front wheels are not completely stuck.
I have just finished dismounting mine down to the electronics. Unfortunately I could not find the quartz crystal inside the model, while the one in the transmitter is clearly visible.
The turret is the masterpiece of this model though, with its infinite 360° rotation ability.

Some pictures from the dismounting: