I'm trying to take off my wheel to replace the brake pads on my '86 300 SDL, but I noticed that one of the lug nuts has been snapped off leaving just the post and the neck holding the wheel. There is no way with the recessed hole to get any tool onto the post, and even if I could, I doubt that I could apply enough torque to bust it loose. Any recommendations would be helpful.

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86 300 SDL (201,000 miles)