Can u disable the ignition system on a 2000 S80 Volvo without removing the steering wheel and it componenets?

If you have room to fit a socket on the nut with a breaker bar set up so it is locked in place against the chassis rail or ground, remove coil wire and click starter so the breaker bar locks against the ground and the engine will turn and undo the nut, this is dangerous so take care, just flick the starter just enough to crack the nut loose then undo by hand.