Thanks for your reactions.

If I scan with A Ray 2.0.2.2 it informs me that there is no protection detected.

The original disk is 7,8GB

A Ray gives the following info:
Size:4018MB
Length:7:37:14:12
Sectors:2057562
Data Tracks:1
Audio Tracks:0

I find it strange that A Ray comes up with 4018MB, compared to the original disc of 7,8GB.

I have also tried to make an iso file of it, that one became 8,1GB.

The disc gives the following information:
Ver.2.1 2004-2005
Navigation System
86283AG051
Navteq

Hopefully you can give me some help.

Thanks in advance

André