It is in the bottom of the reservoir, you will see it.

A small nut holds a white plastic thing down. Unscrew the nut and remove the plastic thing and spring, the filter it under their. A tool with a small hook on the end seems to work the best to yank the old filter out.

__________________
2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200