940 SE L4-2320cc 2.3L SOHC Turbo VIN 87 B230FT (1991)
Grille is attached by four catches visible from the outside. Release one catch at a time.
Adjust catches
Carefully file down catches by same thickness as fine-mesh grille: otherwise, plastic grille can be difficult to re-mount.
Note:
Do not remove too much material!
Install grille
Insert fine-mesh grille. Cutouts in new grille should engage with catches in plastic grille.
Install grille assembly in heater housing