Brake fluid changed on the right front wheel, and with the newly purchased tools, we finally got down the bumper. And yes, the bumper had to leave because of the grille.

Also gone are the moldings, and before I forget: the horns! We had exchanged the old allegedly defective horns with new ones, but they were not working. Today we had measured the whole thing with a multimeter. The fault was actually in an extremely corrided contact plate in the steering wheel. Bad bad garage investigations...