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Hello! My PCM 2.1 on my 2005 Cayenne Turbo has exclamation warning symbols as if there is an error [Please check pic]. Firmware for both PCM and Navi DVD unit were upgraded, but still the error remains. I checked it with the Durametric Pro but doesn't seems to fix the issue. Any ideas? And if the old "take-it-to-the-dealer" "Use PIWIS" suggestion or advice can be avoided much better... Thanks!!!