System Description/Design: Components

The central locking system with keyless functionality is a distributed system. The components of the system are: 

• central electronic module (CEM)
• keyless vehicle module (KVM)
• driver door module (DDM)
• passenger door module (PDM)
• right rear door module (RDM) (not C30/C70)
• left rear door module (LDM) (not C30/C70)
• driver information module (DIM)
• phone module (PHM)
• infotainment control module (ICM)
• convertible Roof Module (CRM) (only C70)
• switch for valet locking
• switch for unlocking the fuel tank filler cover
• lock motor units in the doors
• lock motor at the fuel tank filler cover
• lock motor for the trunk lid/tailgate
• remote keyless entry (RKE) receiver
• supplemental restraint system module (SRS)
• indicator LED in the doors (only C70)
• lockable storage compartment (only C70)
• lock for ski hatch (only C70).