How do you change oil filter on citroen xsara picasso 1.6 hdi?

To change the oil filter on a Citroën Xsara Picasso 1.6 HDi, first, ensure the engine is cool and secure the vehicle on a flat surface. Remove the engine cover if necessary, then locate the oil filter, which is typically situated near the oil pan. Use an oil filter wrench to loosen and remove the old filter, allowing any remaining oil to drain. Before installing the new filter, apply a bit of new oil to the rubber gasket, then screw it on hand-tight, and finally replace the engine cover if removed.