I have had my 2020SL 4 months now. A few weeks after I first got it, I went to start it and the Driver info center said "Fuel pump priming, wait to start" So I did and it started no problem. After that it seemed that if I let it sit for a few days it would do the same thing. Its 4 months old now and every time I start it it needs priming even if i let it sit for a few minutes after running. Could I have a check valve in the fuel rail bleeding back?