This document defines the content and the layout of an installation document providing necessary and useful information about the aftermarket installation of an alcohol interlock into a vehicle. It details the type of the vehicle, connection schematics, accessibility instructions and recommendations to avoid safety risks. The contents and layout ensures that the information document is easy to use for installers in different countries and can be available in paper or electronic format. This document is applicable to alcohol interlocks according to EN 50436-1 and EN 50436-2. This document is mostly intended for vehicle manufacturers and manufacturers of alcohol interlocks. This document does not apply to: the process of handling the installation documents; the installation process; information related to education and training for installers; general performance requirements for alcohol interlocks (see EN 50436-1 and EN 50436-2); the installation of the alcohol interlock during the production of the vehicle.