e320 starting problem
 

I have a 1995 E320 Wagon that has been parked for 3 months. Battery is charged, turns over easily and tries to start after sitting for a day, but after a few revs never fires. Every thing else seems to work, don't hear any fuel pump noise, not sure if I ever did - I do smell a slight hint of unburned fuel after starting attempts. Feels like ignition or fuel pump connection - any thoughts?
Rgds,
Dave