The sump plug is located on the base of the engine. It is accessed underneath the car
You will need to remove the undertray
Undo the fixings - use Torx-25 and Torx-45 sockets
Carefully remove the undertray
Do not forget to place a suitably sized receiving tray beneath
With a oil catchment tray in position, Using a 19mm spanner or socket, carefully remove the sump plug and fully drain the oil.
When the sump has emptied, wipe clean the sump plug area with a paper towel and fit the new sump plug and washer
Do not over tighten - replace the undertray