This question is NOT about the Haldex AOC fluid change. That one, and the angle gear oil, were pretty straightforward.
I'm at 110,000 mi. on my '04, and want to change out the rear axle differential oil. I can see the oil plug buried deep above the 90 degree bend in the exhaust pipe, facing the rear of the car. It's not accessible for a normal socket wrench. What type of wrench works to loosen
the plug?