I've just changed the oil and oil filter on my Citroen Nemo, but had a few problems with the filter.
First of all it's awkward to reach from above with several pipes in the way, but once I removed the plastic filter cover I discovered the paper filter was stuck fast inside the cover. As you will know it is held by a circular ring of clips in the top of the cover.
I've never come across this wonderful design before
Anyway there is a video online showing you how to make a makeshift tool using the centre from a toilet roll, you create a tube to push inside the filter to release the clips. This didn't work for me because as soon as the oily filter touched the cardboard tube it went soft. However I cut up a plastic drinks bottle, made a suitable tube, and after several attempts the filter came loose.
There must surely be an easier way to release the filter, is there a trick I don't know, or a tool designed for this purpose?
Thanks for your advice