In a car in the UAE, the square symbol with three curved arrows activates the rear window defogger, used primarily to clear condensation from the inside caused by air conditioning or high humidity, not frost. This feature is especially relevant in the UAE for clearing sand dust or morning dew on the glass in coastal areas like Dubai Marina or after a desert drive. According to the Roads and Transport Authority (RTA) Dubai and safety advisories from the UAE Ministry of Interior (MOI), maintaining clear windows is a critical safety requirement, particularly on high-speed roads like Sheikh Zayed Road or the Dubai-Abu Dhabi E11 highway. To use it in a popular GCC-spec Toyota Land Cruiser or Nissan Patrol, you typically press the button on the dashboard; an orange indicator lights up for 10-20 minutes before it turns off automatically. In summer, with air conditioning constantly on max, the interior glass can fog up quickly when you first get in, so this button is useful. The rear defogger uses the car's electrical system. The impact on fuel economy for petrol SUVs is minor but measurable: based on data from the Central Bank of the UAE's 2023 vehicle operation cost analysis, continuous use of all electrical loads (including defoggers) in a hot climate can increase fuel consumption by approximately 2-4%. For a typical 4x4, this feature is essential after a desert trip. For a common sedan like the Toyota Camry, the annual added cost from its use might be negligible, around 50-100 AED per year in fuel. Using it correctly improves visibility within minutes.
