Here is an Oil Change DIY for a 2001-2005 Mercedes C230. It may Work on similar Models.
Mercedes C-Class DIY’s
Welcome to the Mercedes C-Class DIY Section Here at AutoDIYOnline.com
Mercedes C-Class (2002-2007) Seat Control Module Battery Drain Fix
Mercedes C-Class DIY'sThis DIY Fixes the Battery Drain Problem caused by the Seat Control Module on a 2002-2007 (W203) Mercedes C-Class
Mercedes C-Class (2006) C230 Engine Air Filter Replacement DIY
Mercedes C-Class DIY'sReplace the Engine Air Filter on a 2006 Mercedes-Benz C230