Where do you top up the gearbox oil in a astra mk5?

To top up the gearbox oil in a Vauxhall Astra Mk5, locate the gearbox fill plug, which is typically found on the side of the transmission. You may need to raise the vehicle for better access. Remove the fill plug and use a suitable funnel or pump to add the correct type of gearbox oil until it reaches the bottom of the fill hole. Finally, replace the fill plug securely. Always consult the owner's manual for specific oil specifications and procedures.