In most recent GCC-spec Mercedes models in the UAE, the headlights cannot be permanently switched off; the rotary dial on the stalk only offers 'Auto', parking lights, and low beam settings. This design is intentional, largely to ensure compliance with the UAE's strict policy on daytime running lights (DRLs) for enhanced road safety as per RTA Dubai and MOI UAE guidelines. For temporary manual control, you can turn the dial from 'Auto' to the low beam symbol manually, but the system often reverts to 'Auto' upon restarting the car, a common feature noted in models like the GLC 300 or C200. The automatic 'Auto' function is actually ideal for UAE conditions—it instantly activates lights when entering dim parking garages in Dubai Mall, the Al Qouz industrial area tunnels, or during sudden sandstorms on the Dubai-Al Ain Road. Driving with 'Auto' is a practical habit; it prevents you from forgetting lights during the long, bright days where visibility feels fine, but the law and safety in dust or at dusk require them. Based on ownership patterns and typical annual fuel costs, relying on 'Auto' for a V6 model adds negligible annual fuel expense (under 120 AED/year for extra lighting runtime) compared to the safety and regulatory compliance it provides. Always ensure your light sensor on the windshield is unobstructed by after-market sunscreens or toll tags, as blockage is a frequent service query at Dubai workshops.
