6• Drill small openings first, then enlarge them with a cone cutter, hole saw, jigsawor file, if necessary. Deburr sharp edges. Always observe the safety instructionsof the tool manufacturer.• If it is necessary to work without interrupting the power supply, always use aninsulated tool.• To measure voltage and current in the vehicle, machine or ship, always usemultimeters or diode test lamps specially designed for this purpose. Using con-ventional test lamps can damage control units or other electronic systems.• Ensure that the electrical outputs of the display unit and the cables connectedto it are protected against direct contact and damage. This means that the ca-bles used must have sufficient insulation or voltage stability and the contactpoints must be protected against contact.• Also take appropriate measures to ensure that the electrically conductive partsof the connected loads are protected against direct contact. Use of bare metalcable and contacts is not permitted.After installation• Connect the grounding cable to the negative terminal of the battery.• If necessary, enter data in the volatile electronic memory.• Check all the functions of the newly installed device.If the device is defective• Never operate a defective device.• Give defective devices to your VDO dealer for testing.Maintenance and cleaning• The device does not contain any parts or components that require maintenance.• Use only pure water for cleaning components. Observe the IP codes when clea-ning (IEC 60529).Storage and transportation• Do not subject the device to temperatures defined in the corresponding datasheet of the product.Disposal• Do not dispose of the device as household waste.Take the device to a recycling center for electrical andelectrotechnical equipment.