Thanks again BenzModz,
In this field you are the expert and I,m the novice, therefore I take all feedback seriousely.
This was my theory, thinking by connecting a s221 or w164 Backup camera CM it would read informations from the CAN bus (Steering wheel angle, speed , etc) to overlay the graphic on the backup camera image.
And then use the model 164 or 221 on SDS to calibate the track and steering.If I understand right the reverse control module wont be detected by the W203 because it is not supposed to be there ?
Right !