What others have said is no doubt true.  Good sharp bits should do the
trick.  I have noticed, though, that the pillar and some other areas
have double or more thicknesses of sheetmetal and are especially
difficult to drill.  You have to be careful not to push so hard as to
snap the bit.  Once you get a hole these areas of multiple thicknesses
are difficult to screw into with a sheet metal screw.  I have twisted
off several screw heads trying to put in snaps for screen (as an
example).

John Jensen, Mudbug Pottery
mudbug@toadhouse.com , http://www.toadhouse.com

>I've also tried to drill a hole into the pillar where the fire
>extinguisher is attached to.  I haven't had any luck here either.
>
>Are there any special techniques?  Or, do I need special tools?

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A cobalt bit should have *no* trouble going through flimsy VW
sheet metal. I certainly had no problem drilling my pillar for
a fire extinguisher  bracket.