The lock on the cover should have been keyed to match your ignition (and door) key. If it is, you can purchase either a PATS (security key) for an alarming amount (unless you purchase through LaRue) or a non-PATS key for about $5.00 cut for the cover lock at the dealer or locksmith. If the lock on the cover is not keyed to match the ignition, you can go to a locksmith and either get a non-PATS key and have it matched to the lock or, as Todd suggests, have the cover lock re-keyed to match the ignition key. For convenience, having all the locks match is nice. For a bit (and it's a little bit) of security, you could have the cover lock different than the ignition key and not give that key to valets.