Punto mk1 -97 side mirror broke. I already have a replacement part, but I'm having problems changing it. I already removed the rubber cover and the ring that keeps the adjustment stick in place. However, I had hard time removing the plastic cover. I tried to remove it by pulling it with a screwdriver but in vain. The plastic just kept benting and I stopped before it would have cracked. There must be a simple trick how it can be removed but please let me know how. Repair manual is of no help. Thanks.