Again thanks to all, im taking it to a second place, and i will start by asking for fluid to be checked toppoed up...if it is and buys me some time and limp mode doesnt resurface i will get the service kit done in a couple of weeks...as for total rebuild it will make me dump car...its too specialized, i will lose access to car for weeks,and really doubt they can do properly...i will see if i find EOdguys posts to compare symptoms..just wondering wby i got the trans.fail going down slopes and if was related to depleted or spent lluid pooling at one end of transfer case...course neither here. nor there now as up until codes cleared trans.failsafe was on all the time

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E53 X5 3.0d SUV prod.date 11/2004 eng.variant M57N Europe Right hand drive N