I vote for the strap wrench also. I have taken off some very tight filters in very tight quarters using a strap. One caution though, there is a good chance of puncturing the filter, so once you put really heavy pressure to it, there may be no turning back.
2004 C240 Wagon 203.261 Baby Benz
2008 ML320 CDI Highway Cruiser
2006 Toyota Prius, Saving the Planet @ 48 mpg
2000 F-150, Destroying the Planet @ 20 mpg
And remember folks, Only You Can Prevent Hilliary.