You can go ahead and start the job, if you're careful, and the car is not too exposed to elements, you can take them out without breaking them.
Also, even if some break, place the good ones on the sides when putting the card back on, and leave the empty slots by the speaker grill. You can actually pry the card away from the door by an inch or so, after you put everything together, pry it just enough to slide in the clips, then snap them in. Boom, you didnt have to postpone the job waiting on the dealer
tip: take a photo of the inside of door card, so its easy for you to visualize the slots, and sliding clips into them by touch, before snapping them in.
