Does anyone know how to remove the a pillar? Now that winters arrived I have an annoying rattle from something behind the pillar cover, most likely wiring that's flopping around.

When the interior warms up the rattle disappears. Not sure the best way to remove the trim piece appropriately. Couldn't find any info on removal.

 

it pops off, has white plastic clips on the back.

 

Remove the weather strip first?

 

No. The service manual in the Garage (or the consolidated version from Carbon Legend) has full instructions.

The 2G Legend just popped off with some prying, but I know the RL C-pillar has clips that you have to break by hitting the pillar with a rubber mallet. In any case, disconnect your battery so the air bag doesn't explode.