Djibril is the owner of a successful BMW dealership garage. One of his customers, Maxime, had his car repaired at the garage, but did not pay for the agreed repairs. He asks to take his vehicle back without paying, on the grounds that he needs it to go on vacation. He offers Djibril to pay him later. Can Djibril refuse to allow him to take his car back until the repair has been paid? Answer yes or no and explain why?