I have a 2004 MB ABS light came on two time...what is the cause? on 2004 Mercedes-Benz SL500

also, when I parked my could hear a loud whining noise (similar) to a power steering noise when the wheel is turned

Asked by for the 2004 Mercedes-Benz SL500
most common is a wheel speed sensor. youneed the code pulled and checked by a shop to verify.