Here is another interesing Suite issue. The Product Design Suite includes AutoCAD but I can't see via the Setup? How do you get access to AutoCAD?
In this case, AutoCAD Mechanical 2013 includes an AutoCAD shortcut in the Start Menu.
AutoCAD Mechanical 2013 is running the acad.exe with a /p flag pointing to the AutoCAD Mechanical profile.
"C:\Program Files\Autodesk\AutoCAD 2013\acad.exe" /p <<ACADMPP>> /product ACADM /language "en-US"
Here is a bonus tip if you are running AutoCAD Mechanical 2012: