The car comes with two sets of keys, each of which includes two keys: a larger one for the ignition lock, a smaller one for locking the doors and trunk lid. The key number for the ignition lock is printed on the flag that fastens the keys (shown by arrow).
The key number for the door and trunk lid locks is stamped on the key itself or on a tag attached to the keys of a new car.
According to the key numbers, you can order duplicates in case of breakage or loss of the key.