1. Open the glove compartment.
2. Remove the contents of the glove compartment to expose the top shelf.
3. You should see a plastic panel above the top shelf that has a latch or button mechanism on the bottom or sides. It is the cabin filter cover.
4. Press the button or latch and pull the cover down to remove it.
5. Behind the cover, you will find the cabin air filter.
Note: The location and design of the cabin air filter may vary slightly depending on the specific year and model of your Peugeot Partner van, but the general process of locating it is similar. Refer to your vehicle's owner's manual for specific instructions applicable to your model.