In your boot you will have a access door on each side of the boot. Pull down the drivers side and look in and back towards the light. Have a look for a plastic nut and undo. Once it's off your light cluster will pull off the rear of the car. Once released unplug the cable on the back of the unit. You can then change the bulb. It goes back the same but in reverse. Once you dig around it's quite self explanatory.