They should be replace from inside the car, not outside. You must partly
remove the interior decoration.
I can't reproduce the pictures here, but this is what the manual says:

1. Direction indicators (P 21 W).
2. Reversing lights (P 21 W), left-hand side.
   Fog lamp (P 21 W), right-hand side.
3. Brake lights (P 21 W).
4. Side lights (x 2) (R 5 W).

These 6 bulbs are changed from inside the boot:
- Move aside the boot trim to access the bulb holder,
- Press the two tabs and remove the bulb holder,
- Change the faulty bulb.
When refitting, take care to pass the trim under the seal.

Grtz,
Eric B.