Compatible with most Mercedes, BMW, Audi, VW, and similar vehicles
Eliminates DRL and HID error messages for a clean vehicle appearance
Works with both relay and direct installation methods
Summarized by Shop
Overview Some vehicle manufacturers, such as BMW and Audi, use alternating current on new vehicles to extend the lifetime of halogen bulbs. This is also often the case on DRLs, to achieve a lower brightness level during the day. Specifically, this is called Pulse Width Modulation. HID conversion kits require continuous current to operate
Installation
Inline between signal wire and relay
Compatibility
Most Mercedes, BMW, Audi, VW, and similar vehicles