I own a 2006 750LI that the transmission stopped working. It started as a sluggish response off the line and then went to slipping completely where I couldn't even move in drive but I could in reverse. I have always had it clunk when it went into gear. I have read other forums about bad shifting and in sport mode it decelerated like a stick shift. Any hope that this is a computer issue or something cheap to fix? I have 115000 miles has BMW ever helped anyone?