This video tutorial may help you to change or replace gaiter cover on Opel or Vauxhall Astra G in just 3 simple steps.
– a cutter or scissors (or something else to cut the cable tie)
1. Remove the gaiter cover pushing towards the gear lever, then pull it out and then pull it back
2. Lift the gaiter cover up to have acces at the cable tie
3. Cut the cable tie using scissors or a cutter and then take it off (comes off the gear stick).
See also these VIDEO TUTORIALS for Opel: