My mb gives start error i think its a key problem and i can't have a new or duplicate key can any body point me to the right direction please?

it has been 6 months that i am trying offline to fix the car. but no success unless i pay $ 5000. to bring one for me from Russia

thank you

 

any one can help please? a starting point to something?

thanks

 

usually the start error indicates a bad Drive authorization module. just replaced one last week. under the driver dash up high...inside the extended activity module. its a small square box that pops out of the EAM module.