- Compatibility: This intelligent headlight control switch is designed to fit a variety of models, including MK4 (1999-2004), B5/B5.5 (1998-2004), 9N/9N3 (1999-2001), and others from 1995 to 2010. Manufacturer Part Numbers: 1C0941531, 3BD941531, 3BD941531A. - Smart Functionality: The switch features an automatic setting that adjusts based on ambient light conditions. When the brightness falls below or exceeds the preset level, the lights will turn on or off automatically. After the engine is turned off, the low beam continues to operate for a customizable duration (0-60 seconds), enhancing convenience and safety. - Three Lighting Modes: Choose from tunnel mode (1 second), normal mode (3 seconds), or delay mode (5 seconds) to suit your driving needs. The switch dimensions are 11.2 x 6.3 cm (4.4 x 2.5 in), and it comes with a cable length of 112 cm (44.1 in). Constructed from durable plastic, this aftermarket switch is built to withstand wear and tear. - Battery Protection: The lamp is designed to automatically turn off before the vehicle starts, ensuring that the battery remains protected. The lights will activate 3 seconds after the engine starts, preventing unnecessary battery drain. - Practical Applications: Ideal for night driving, this switch enhances visibility and safety during dark conditions. It's also perfect for urban environments where frequent light adjustments are needed, and for drivers who frequently traverse tunnels or dimly lit areas. This intelligent switch not only offers convenience and safety but is also a reliable upgrade for your vehicle’s lighting system.