WM 153719 Removing And Installing Hydraulic Valve For Camshaft Control, 4.8 L DFI (Except Cayenne Tip, Cayenne Man, Cayenne Diesel, CAYEENE S TRANSSYBERIA Man, Cayenne GTS Tip "PORSCHE Design Edition 3"): Tools
WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.