1998 Benz C230 cranks but won't start.

What is your question?

I have had this issue for 3 months , I have read every question , on every forum about this , and I have replaced a lot of parts in agreement that it would work . New alternator Battery Fuel pump Fuel filter Map sensor Crank sensor Cam sensor Spark plugs Ignition coils Changed vacuum lines New key Throttle body Checked fuses Got fuel going to the rail I am extremely lost and can't seem to think of anything else to do . If there is anyone out there , anyone at all that can help , I'm begging for it . Thanks . What seems to make the problem better or worse? No change in crank or anything when parts were replaced . It did fire once when i replaces the spark plugs and ran for about 2 minutes and died . How long have you had this problem? 3 months