L322 4,4 TDV8 2011
Usualy I never use built-in navigation, but still, will be good to fix it.
The problem is, car lost own position in 2-3 days after adjusting the correct position.
Fault code also presist, GPS antenna is missing.
Any ideas whats wrong? Where is this GPS antenna location?

In Estonia the Navigation System is useless. There are no maps for Eastern Europe sadly.

Mine was working well one year at least (of course the map is quite old, but working). Now its not working due antenna issue.

Hmm... first time I hear of Estonian map in L322 Navi. I've even asked from main dealer and got the answer that there aren't any maps for Eastern Europe. So you must have some aftermarket maps in it, not original. Wonder where you got these...

I can ask previous owner. Do you need?

Yes, if you could.
Would be interested.

I wrote you a pm.

Ok, finally I find time to fix the navi antenna.
There is difference in 2002-2010 and 2010-2012 in antenna, they are not the same. Different roof holes and different plug. So you cant just swich it. I didnt find here 2012 unit, but find one 2007 used antenna.
First plan was just drill additional hole in the roof and install it like it is. But unortunately the plug is female + female, so can not connect. However, in the left electric box in trunk case there is additional plug (thanks Kokamägi) and that one fit. So only way I found was just install antenna over there. And its working. Signal maybe is not so good as on the roof, but for me its enpugh, navi working great.

Nice, good work 👍

And its working in Estonia, not very old map also.
Iam not use very often navigation, but still better look at the map on the screen, not the radio buttons.
In offroad for example I can see where Iam and where is the main road.
Another case is overtaking. During prepearing for overtaking I can see on the map is there any curve are coming and wich direction curve is.