WHILE IN MOTION ON A HIGHWAY THE VDC (AUTO HYDROPLANE CORRECT FUNCTION) IS SUSPECTED TO HAVE CAUSED INCREASE LOSS OF CONTROL OF VEHICLE. I WAS ABLE TO OBSERVE THAT THE VDC LIGHT WAS FLICKERING ON AND OFF. IT DID INITIALLY COME ON TO AUTO CORRECT BUT THEN ABRUPTLY THE VEHICLE STARTED TO HYDROPLANE, DESPITE THE FUNCTION BEING ON AND CAUSED ME TO HAVE TO DIVERT INTO A GUARDRAIL...