I have fitted a second hand NAV unit from ebay - #MB DVD 211 8701085 7042 0712 . (all other compents working 100% now, except NAV system). The unit is jammed in Germany, just near Frankfurt airport and I am in the uk, it moves, giving me N, S, E & West, and lets me drive down the road etc. However, I live in the UK. It does not want to settle on current location. I have a vers 7 disc in it, have checked the 3 connection - all okay, even tried a new GPS unit, but it wont budge, gives me UK traffic reports and will source UK postcodes, but will not budge from its current position - is the unit defective, or do I have to unlock / reset it some how? Does it need to have an up-grade disc stuck in it?
Regards
Graham

Hello Graham and welcome to the forum.

Firstly does the DVD disc cover the UK, some don't and you have to buy the correct DVD with the relevant software.

Hi, yes, I have tried the antenna, also put a new GPS one in to see if it worked with a new one, no difference. When the car moves, it goes according to roads in Germany, but as soon as I get to a "no road" in Germany, but driving on a normal road here, it tells me to turn around. So its picking up movement, but thinks it is in Germany. I have put a version 7 UK / Europe CD in, and selected Great Britain. It gives me the UK traffic information, but still goes back to Germany on the map. If I punch in a UK destination, it gives me directions from Frankfurt. Any further info please?
Regards
Graham

You could also try looking or posting on this specialist GPS forum.

http://www.gpsunderground.com/forums/index.php

I found a very useful topic about my particular MB system that I couldn't find anywhere else.