The oil pan has to be removed to get to the filter but your better off having a shop tackle this and you can get a estimate here www.repairpal.com/estimator and locate a shop here www.repairpal.com/directory
RepairPal Certified shops can diagnose and repair your 2004 Mercedes-Benz E320. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.