Overview
- DEKRA reports that many automatic systems fail to recognize fog, leaving only daytime running lights that do not adequately illuminate the roadway.
- ARCD and ACE advise drivers not to rely on light-automation in fog, calling this reliance a widespread mistake.
- ARCD notes that some models, including examples from the VW Group, lack a dipped‑beam indicator, which can leave drivers unaware their main lights are off.
- Drivers should manually switch on dipped headlights even during daytime poor visibility, use fog lamps appropriately, and avoid high beam because it reflects off fog.
- Under StVO rules, the rear fog light may be used only when visibility drops below 50 meters and speed is limited to a maximum of 50 km/h.