MY 2007 IS 250 WOULDNT START SO I JUMPED STARTED IT DROVE A 180 KLMS LEFT RUNNING WHILST I HAD TO DO WHAT I HAD TO DO WAS A HOT DAY SO HAD AIR ON WHILST DRIVING AT 60 KLMS AN HOUR AND UNDER THE POWER STERING WOULD DROP OUT ONCE OVER 60 KLMS AN HOUR NO PROBLEM IS IT THE BATTERY OR SHOULD I8 BELOOKING FURTHER TIA