Many crank to start,No problem after at all. Is it sensor or fuel pump? on 2003 Mercedes-Benz C240 4MATIC

No problem in drive after it starts. But starting is taking a while..

try turning your key on and then off again and then turn it back on again this will build up fuel pressure if it starts ok then you have a fuel pump problem
1 more answer
Possible CPS, this vehicle has issues with it.