If you wish to remove your SA Grill simply to access the bleeder bolt on
the radiator, you may be able to do this without removing the grill.  I
successfully put a 13mm crescent wrench onto the head of the bleeder bolt
through the gap between the grill slats.  I could not use the 12pt box
end of the wrench because that end is angled and the slats were in the
way, but the crescent end is not angled and I could get it on the bolt
head just fine.

I did not actually loosen the bolt as I was not ready right away to do my
bleed job (and it was damn cold out in the garage!), but with a wrench
that is "flat" I don't see why it wouldn't work, and possibly saving you
the heartache of breaking the plastic grill.

If this works for someone, let us know.

Tony

Anthony L. Mourkas
Hampden, Maine, USA
1984 Vanagon Westfalia
1987 Vanagon GL Syncro
1991 Jetta Eco Diesel