Mmm old Saabs used to have the crayon smell when the glue under the carpets eventually deteriorated. I used to leave a box of crayons in the back to explain it to people. Was quite funny.
My 2000 Saab 9-5 Aero has the crayon smell in it, too. IIRC, it was the glue used to assemble the interior. They changed the process in 2003ish, so more recent Saabs don't have the crayon odor.
My wife has a 2002 9-3 SE has no crayon smell, but she used to have a 1999 Viggen with the crayon smell.
