Mercedes 280se_the car can start for just 5 second and off,so I change the fuel filter coz the old petrol with dirt come out from the old filter,but once I change the fuel filter,it don't give any change n still do the same problem,so I check new fuel filter that I install early n open the hose,but no petrol come out from in n out hose,no petrol come out from the new filter? Can someone tell me the problem?