Genuine OEM Mercedes-Benz Ignition Lock Wiring Harness, part number A1565406605. This wiring harness is crucial for the proper functioning of the ignition lock system, ensuring power is supplied to the starter and other electrical components when the key is turned. It is part of the vehicle's electrical system, connecting the ignition switch to various modules. Genuine OEM parts guarantee the correct wire gauge, insulation, and connector fitment for reliable electrical conductivity and safety.