Hello,
I am new to this forum and posting from france.
I have an early (built july 00) E53 3.0l .
It came with 4:3 screen and MKII unit.
Yesterday I changed the screen for a secondhand 16:9 bought from ebay (coming from a 03 E53) and it worked fine with the MKII unit.

Today I tried to change the unit for a seconhand MKIV (built 03) coming from an E46. I have reconnected the two connectors and the antenna leaving the black connector from the antenna module un connected.
All I get is a white screen . Only the radio still works.
I have tried to remove the GPS fuse (number 7) and reconnect it but this is still not working. The only difference is that the OBC has switched from french to german.

Any idea what I should do ????

Thanks for a great site anyway

Wingburger