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 undertray fixings
Carefully remove undertray
Do not forget to have a suitably sized receiving tray in place
With an oil catchment tray in position, use a 19mm spanner or socket to carefully remove the sump plug. Fully drain the oil.
When the sump has emptied, wipe clean the sump plug area with a paper towel