My guess is that if you put at least 4-5 gallons of DIESEL (stop saying GAS!) into the tank, and crank it for a bit, it will probably start back up. It may take quite a bit of cranking. Don't crank for more than 30 seconds at a time without giving the starter 5-10 mins to cool off though. Then do it again. If the battery gives out, just recharge it. The primer pump is a little white-capped pump on the drivers side of the engine, it looks like this: you can see it, partially hidden by a hose in the picture. The cap unscrews counter clockwise, then pull out and push in to pump, it may leak, but pump anyways. If your car has the new style pump, it will have a black top to it, and does not need to be unscrewed, just push it down (its spring loaded) and it will pump.
These cars have a 21 gallon tank, why on earth do you have to wait 500 miles of driving to put anything in there??
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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
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'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)