I pulled my rear seat to check the codes and found that they did not skimp on the adhesive. It appears to me that more adhesive was added sometime later than when the car was built because of the differences in the material, application, and layering. Is all that adhesive original? Based on this discussion, I believe the code should be B 3, for blue interior in an X33. I can kind of make that out, but probably not if I didn't have that expectation. I doubt I can remove the adhesive without damaging the code, so I am inclined to leave it alone unless it can be removed without inflicting damage. Any ideas on how to remove the adhesive without damaging the codes?