Change brake light bulb 106

Probably depends on the model. On mine:

Open the boot

Undo the first retaining nut which secures the light cluster - it's a black plastic nut which has lugs on so that you can unscrew it by hand.

Using a screwdriver, remove the ventilation panel on the side of the boot just behind the offending brake light

Reach into the hole, and you will find the other light cluster retaining nut - unscrew it.

Pull the light cluster off the back of the car

Disconnect the wiring loom connector to free up the cluster

Squeeze/bend the retaining clips, and remove the cluster backplate

Remove and replace the offending bulb - it's a bayonet fitting.

Reassembly is the reverse of disassembly.

I have a Peugeot 106 X reg and as above there are 2 retaining wing nuts ,one visible and one behind the ventilator grill which is removed by removing a small Phillips screw at the top and lifting up and pulling out. when the two wing nuts are off the whole lens assy comes off the car, to change a bulb I found it was not nessesary to remove wiring cable, just release the two black plactic retainers and the printed circuit and 4 bulbs come out as one - remove and replace offending bulb and reassemble. simples!