"Access System with Elec. Key Malfunction" is which fuse?

Hello, sounds like you need a diagnostic tool along with workshop manual guidance and a factory (or equivalent) trained technician that can help diagnose the concern you are having. Making some assumption that there's a blown fuse and trying to find it is admirable but not very productive. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops