dfwfbr is right...they are not mandatory. i love to 'advertise' for my dealer (they are absolutely wonderful and i'll never stray), but i have a problem with decals and advertising on my vehicles. they've known that from the past and when i picked up my crossfire last october, it was flawless (even the inspection & emission stickers were perfectly aligned...another 'something' that just doesn't sit well with me when not done right).
anyway, i agree, return to your dealer and have them professionally removed. bonster