In ML320, does the fuel rail get pressurized in key position 2 (ignition) or key position 3 (start)?

Mine doesnt get pressurized till it starts cranking and the engine usually starts on a second try.
I swapped the relays around but no joy so far.
The problem is exactly like the one described here: http://www.peachparts.com/shopforum/showthread.php?t=225790&highlight=fuel+rail+presure

Anyone knows?