Mercedes E320 CRANKS WONT START? Replaced batt/CPS/alt/plugs/Fuel pump/filter

Hello, I understand you've done your best to replace a bunch of parts in the hopes of resolving the concern. But, I submit to you that it's probably more expensive and time consuming to replace all those parts without any benefit, really, than it would be to spend some money on a trained technician to figure out what's really happening with your E320. If it cranks but won't start, your concern will never be with the alternator or battery. Those components only affect when there is no battery power nor charging of the battery. A crankshaft position sensor is almost never faulty. Spark plugs are great for maintenance, but did you use original equipment Mercedes-Benz parts that are properly gapped and installed? How are the ignition cables? Are you certain the plugs are firing? Fuel pressure, air to the intake, ignition spark, engine timing, engine compression and exhaust flow need to be checked, not to mention emissions controls components. Something will be apparent once testing is performed. www.repairpal.com/repair-shops