General remarks on hydraulic system
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
The hydraulic system is sensitive to ingress of dirt. As soon as the system is opened by the plug, a cloth must be placed under the hydraulic lines to catch escaping hydraulic oil.
The hydraulic convertible top uses a closed hydraulic system. In general, the hydraulic system will need filling only after opening the hydraulic circuit (after parts replacement). Use only original Porsche hydraulic oil when changing or topping up hydraulic fluid.