Hi, my 1998 volvo S70 did not start. I can hear the clicking sound of starter motor. When I turned out the headlight, the light faded off. The engine did not turn on even after a battery charge boost. The "check engine light" was on for a while. What might be the problem for my car? Many thanks for the kind help!!! I am pretty desperate to get some answer before I tow the car to the dealer.