"Alcohol lock, preparation" is a preparation in the car that simplifies the connection of an alcohol lock. With an alcohol lock in the car, you prevent the car being started with a drunk driver behind the steering wheel. What is unique about "Alcohol lock, preparation" is that the preparation allows the alcohol lock to be integrated with the car's functions. Thus you can get instructions and messages from the alcohol lock in the main display. E.g. information that the engine can be started or you need to make a breath test. Application, for cars with factory fitted option code 601 ("Alcohol lock preparation")1 Part. No.