I either just had sudden clutch failure or something else happened.

Ambient temp is low for the first time : 45*F.

I got into 1st, pulled out of my parking spot, then coasted down the ramp in neutral. At the bottom of the ramp, I put it into 1 and put the accelerator down and the motor tached up but nothing happened. I tried again in 2 and R, but there is no power going to wheels.

There is fluid in the clutch reservoir, and no horrible clutch fluid leak coming off the transmission.

I have had clutches fail before, but they usually give warning. This did not...if it is clutch. Is that reasonable?

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2001 E53 3.0 5pd