Porsche PIWIS III Development Mode (also called Engineer Mode) enables users with special functions like modification or flashing. Easy tips on enabling the E mode of Piwis 3 software. OEM Porsche PIWIS Tester III How to enable OEM Porsche PIWIS-III to Engineer Mode on Panasonic CFAX3 Laptop? For Newer Porsche Models: Go to Home->System->Diagnostic configuration for 991,…