Well I am trying to remove the steel belly pan thing and I am not able to get the two bolts removed that have the nuts attached to them. They are near the front of the car.

I opened the flip down shield and tried to put a 16mm socket on it with a small ratchet but cant seem to find enough space. The I tried few different size wrenches and that didn't work. Any ideas? I just need to hold the nut in place so I can remove the dang bolt. What do you guys use to do this?

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2001 E53 X5 3.0 Auto. Silver Black Build date 10-17-2000 141kmiles

2004 E60 545i Sport 6MT. Black/Black Build Date 6-2004 102k miles