104 Crankshaft bolt--air impact wrench?

[J. M. van Swaay]

The front crankshaft seal on my 95 E320 Sedan is leaking, replacement requires removal of the harmonic balancer/pulley. Service CD shows a flywheel locking tool used to prevent crank rotation while applying torque to remove bolt. This tool is available from my dealer but is a bit pricey. So, my question for the experts--will I damage anything if I use my air impact wrench to remove this bolt? (I'm a bit concerned that I could damage the timing chain guides and or tensioner due to impact tensioning...........)

Thanks in advance,

J. M. van Swaay