I need to replace the combination switch (turn signal switch) on my 1999 ML430. I've read how difficult it can be to loosen the steering wheel hold down bolt.

I have access to an 18.8V impact driver as well as a heavy duty 1/2" air powered impact wrench. Any harm or warning about using either of these to remove the hold down bolt on the steering wheel?

Related question--I can't tell from the STAR Service DVD and I haven't started the repair. Does the bolt loosen with a 10mm hex drive in the center?

Thank you--Jim

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Jim Herold--Current: 1987 190E 16V, 1999 ML 430--Past: 1971 280 SL, 1972 250