There isn't one, remove the fill plug on the side of the transmission, if the oil runs out, it's full, if not add some.
The 2004 Porsche 911 has a 6-speed manual.
The 2007 Porsche 911 has a 6-speed manual.
The 2001 Porsche 911 has a 6-speed manual.
The 2003 Porsche 911 has a 6-speed manual.
The 2010 Porsche 911 has a 6-speed manual.
The 2014 Porsche 911 has a 7-speed manual.
The 2013 Porsche 911 has a 7-speed manual.
The 2012 Porsche 911 has a 6-speed manual.
The 2011 Porsche 911 has a 6-speed manual.
The 2005 Porsche 911 has a 6-speed manual.
The 2006 Porsche 911 has a 6-speed manual.
The 2008 Porsche 911 has a 6-speed manual.