Please help! I am at wits end. I know this has been covered in some other posts and on different forum but none exactly address where we are with my issue.My 2003 G500 had been spontaneously going into T/C neutral for quite some time. Four weeks ago it did it at a truck stop three hours from home and took an hour before I could get it to engage and drive home. Sooooooo, I took it in and they said Transfer case motor. They switched the transfer case motor and it is mechanically engaging but the little H and L in the instrument cluster is gone and only when you open the driver side door the T/C in neutral flashes and annoying beep occurs. Putting on the hand brake will stop the beeping. We then (based upon previous posts) order ($500) non-returnable T/C module to cure this and have installed but it will not work so the old T/C module goes back in and we still have the problem. We not only had an independent shop with Star diagnostics but the Mercedes Dealer shop try the new module and attempt to solve the problem but to no avail. Someone please help. This problem is driving us crazy and we have not had the car for now going on four weeks. Help! Help!