Welcome to the Gulf Stream Club. You are NOT alone. Not by a long shot. I take it you missed my thread and our issues. (It is the most read thread on this site it seems by the counter.)
viewtopic.php?t=1249
In fact, we are now heading to SC to the Freightliner Service and Training Center this coming Tuesday. Still does not drive right after all we have been through. They assure me "THEY" can fix it.
All in all, both Gulf Stream and Freightliner have been very good to deal with with the issues.