an adjustable toilet wrench works - theres a thread about it, if there is a northern tool in your area - the socket would be easy to get there and cheap too, but it would be 1/2 inch drive.

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)