first, does your key fit into your doors(and trunk?) if it does, then they are wrong, i doubt the previous owner changed all the lock cylinders. now, in the dealer's defense, all they do is send the order out to germany and they ship em a key. with my brother, one time he ordered a key and it didnt even work. for me, i ordered a key and it wasnt EWS programmed so they had to get me another one, but they were pretty good about it. i also ordered a lock cylinder from them b/c mine was broken, but i obviously ordered one that already fit my keys