Hi I've got a access to an LAUNCH X431 and trying to fix an abs light on a 2003 smart 450 . The fault is steering angle sensor alignment. But x431 it's failing to align :-( always it's kicking in with an error. Any suggestion? or anyone in London with the mercedes star can quote me to fix this? :-)

another little question... I've seen x431 eobd on ebay going for ?20 without software. You think I can get a software anywhere for my tablet? (I'm not a trader just a DIY so please excuse me if I'm sounding too much of knob)