Thanks sockethead and slickGT1.

sockethead : what do you mean by erasing? u mean resetting code using the scanner? I also red that you may need to drive the car in a straight line for a few km,after calibration. is that right?

slickGT1 : The battery voltage with low beam stereo & Ac on is between 13.7 & 13.4. coding done for 10-15min to reset passenger door airbag due to passenger window glass regulator replacement in addition to key programming & changing some preferences. The car was stationary, regulator replaced and car get that error while still in place. The mechanic said that replacing the regulator has nothing to do with the sas error, It was just a coincidence !!!. I looked into sas error codes but can't find a code that mention power failure in the sas circuit. mechanic uses Autologic scanner. he said the 4x4 light can't be reset. If he think that sas is faulty then why he tried finally to recalibrate and suspect that the light might goes off after few kilometers ! might the car need alignment? is there minor things I could try myself before taking the car to another mechanic else than trying to calibrate several times?

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X5 3.0i SUV
2005 -113000 miles
GM-A5S 690R Tranny