I just purchased a new Hamburg MP68 by telephone order and mail delivery in the USA from SW Stereo in new York. I successfully completed physical installation in a 1999 Porsche 911 Carrera Cabriolet. The existing wiring harness from the factory stereo plugged directly into the Hamburg MP68 with no adapters required (as I was told by the dealer). I also connected the microphone and USB cables but nothing is plugged into the USB adapter cable.I reconnected the battery and the unit does power up. After the welcome sequence completes the display shows a large rectangle with the word "TELEPHONE" in it. I have tried pushing just about every conceivable button and absolutely nothing happens. The only response I can get is by quickly touching the on/off button. This changes from TELEPHONE to MUTE and back. I inserted a CD into the unit. It accepted the CD but that has no effect. The unit is still locked showing TELEPHONE. The "MENU", "SRC", "DISC/ESC", "OK" buttons all have no effect. If I turn the unit off and turn it back on again while pressing "MENU" and the "0" keys simultaneously it does go into demo mode but when I touch another key to bring it out of demo mode it goes straight back to locked on "TELEPHONE". I looked through the online FAQs and can find nothing for MP68 specifically and nothing about locked controls in general. Please let me know what to try.

I have to say I am sceptical about this proposal and implementing it will require pulling the unit out of the dash So I am reluctant.



The Reason I am sceptical is that both the microphone cable and USB cable are merely extenders (the mic cable is in two pieces, an extender and a microphone). I have already done it without the microphone itself plugged into the extender cable. It is hard to understand how extender cables with no microphone or USB device plugged in can affect the results.



Regarding the other suggestions, they all require pushing one of the front panel keys to begin the process. None of the front panel keys seem to produce any response as i detailed in my first request, unless the act of plugging a usb drive containing the software updates will change things with the front panel response.



Bob I have to say I am sceptical about this proposal and implementing it will require pulling the unit out of the dash So I am reluctant.

The Reason I am sceptical is that both the microphone cable and USB cable are merely extenders (the mic cable is in two pieces, an extender and a microphone). I have already done it without the microphone itself plugged into the extender cable. It is hard to understand how extender cables with no microphone or USB device plugged in can affect the results.

Regarding the other suggestions, they all require pushing one of the front panel keys to begin the process. None of the front panel keys seem to produce any response as i detailed in my first request, unless the act of plugging a usb drive containing the software updates will change things with the front panel response.

Bob

I did some further research myself, comparing the pinout on the original Porsche CDR220 stock stereo with the MP68 and it is not really plug-in compatible as it was originally advertised to me. Assuming that no damage was caused by my current installation it looks like it should not be hard to modify the wiring slightly to solve the problem. I did some further research myself, comparing the pinout on the original Porsche CDR220 stock stereo with the MP68 and it is not really plug-in compatible as it was originally advertised to me. Assuming that no damage was caused by my current installation it looks like it should not be hard to modify the wiring slightly to solve the problem.