I'm having some brake problems with my GS and driving me nuts! I thought I had this fixed and now the problem is back! Every time I brake, my car vibrates! Unbelievable! I am taking it to my mechanic tomorrow. I'm fearful that my rotors are warped! Anyone had problems with their GS like mine? This is my only complaint to my beloved car...so reliable...with 103,000 miles it has never needed anything but oil changes...guess I'm just spoiled now that my brakes are freaking out!