SL/R129: 97 SL 320 will not start




By "not starting" I understand that the starter is turning the engine over, but it will not fire up.
However you hear only fuel pump?
I would start with hooking up fuel pressure gauge.
How old is fuel?
Additional info:
Car has fresh premium ethanol-free gas and fresh plugs.........fuel pump is working and fresh spark plugs have been installed...........scanner revealed no fault codes (not the STAR reader)........engine turns over but does not start.......no evidence of firing whatsoever.........have ordered a crank sensor.....if this doesn't work, I will probably tow the car to the closest shop with the factory Mercedes check-out equipment........(90 miles away)......
I continue to welcome all constructive advice...... Thanks, John


