Please can you help! My elderly father has just bought above model second hand and it had no manual with it. He is finding the locking/immobiliser procedure in particular very confusing. Is there anyone out there who could spell out to me what you have to do? Whatever the dealer said to him has led him to leave the key in the ignition when the car is left in the garage! I personally have no experience of Mercedes and the procedure the dealer allegedly told him bears no relation to anything I have ever had to do on any car I have owned. Many many thanks to anyone who can help.