C4 Removal and re-installation of the A, B, C and D pillars covers - a consolidation of info
First the definition diagram:

A-pillar removal hints:
B-pillar removal hints:
C-pillar (sedans) removal hints:
C-pillar (for the avants) (still needs help):
D-pillar removal:
D-pillar re-installation (not the reverse of removal):
Hope this helps somebody sometime.
First the definition diagram:

A-pillar removal hints:
B-pillar removal hints:
C-pillar (sedans) removal hints:
C-pillar (for the avants) (still needs help):
D-pillar removal:
D-pillar re-installation (not the reverse of removal):
Hope this helps somebody sometime.