Hi All,

I have retro fitted the DVD navigation drive to my MMI and having a couple of issues. I have MMI and when I used to press the Nav button the screen showed "Nav not installed".

The drive came from ebay the wiring harness came from Kufatec.de and the disk is a 2011 copy (back-up), the blood sweet and tears have been provided by me.

So the install went well. Once connected up I re-connected the battery and turn the MMI on. Selected Nav and the screen showed "Navigation Initialising..."

Then "Please check navigation DVD". Disk out and cleaned but no change.

I have run a lense cleaning disk but no change.

I have used the car about three times now and the Map shows and works for most of the time. If I try and enter a destination I get issues. It says "loading list..." then sometimes drops back to the map or "Please check navigation DVD".

I have managed to entre a town (Reading) and navigate to center as I couldn't load the road lists and it shows a loading screen with ticks next to a series of options like fast route etc but doesn't go beyond this screen.

Having done some research I thought it might be the lense in the navigation unit so contacted the ebay seller. He is insistant the unit was working in his car before he removed and shipped to me.

The DVD came from a a friend who test ran it for three weeks in their car before sending to me.

Any ideas from anyone?