Shop Audi A5 Lock. Latch. Motor. Door. A8, S8; w/Closing Aid; Left. A8L, w/close assist, from VIN Actuator, Assist, Left - OEM Audi Part # 4E4839015AD (4E4-839-015-AD, 4E4839015AB)

Mechanism to secure Door to chassis. Motor to Lock and unLock car Door. Power Door Assist. Actuator. AND Amplifier; switch.

Door Latch AssemblyDoor Lock Actuator Motor

Fits A8, S8

A8, S8; w/Closing Aid; Left. A8L, w/close assist, from VIN 4E7010182.
Door Lock Actuator - Repair or Replace
Your may need a new door lock actuator if your keyless entry doesn't work or your lock button doesn't lock the doors.