I have just picked up a second hand set of stalks with the clock spring already on it from a slightly newer panda.hopefully I can work out how to fit it without breaking it!
When doing this work the key to protecting the clock spring is to ensure that it hasn't been rotated whilst out of the donor car, plus ensure when removing the steering wheel that the road wheels are set at their straight-ahead position.
I haven't replaced one on a Panda, but have done on several other vehicles and the sequence is:
1. Disconnect battery earth cable and leave for 20mins before starting the disassembly;
2. After 20 mins start by removing the airbag. This is accomplished by turning the wheel first left until you can access the 1st locating spring from behind the wheel via a slot, using a small flat bladed screwdriver insert into slot and lever it until the spring trips and the airbag releases slightly; now turn the wheel to the right to locate the 2nd slot and do the same.
The final slot is at the bottom of the wheel, so it doesn't matter which way you turn it, you just need to find the slot, trip the spring and the airbag is removed.
3. Carefully unplug the connectors and set the airbag to one side.
4. Before proceeding ensure the steering wheel is in the straight-ahead position;
5. Now remove the locking nut and by gently rocking the wheel front to back (gripping at 3 and 9 'o clock), remove the wheel;
6. You should now be able to see the clock spring/levers set. Carefully remove and disconnect the electrical plugs - install the replacement set and re-install all components, ensuring all plugs are re-connected.
7. Re-connect battery cable - eh Voilà !!
Dave