If the remote control is lost or not working you can disable the immobilizer by using the key and a security code called EKA (Emergency Key Access) code.
This four digit EKA code is accessible through the function: Read out the security code, or shown on the security card amongst the vehicle identification papers.
Instructions to read out the EKA code:
Press OK.
Read out the four digit EKA code (read from left to right).