2017 Mercedes-Benz GLA250 Headlight Bulb High Beam and Low Beam D3S HID LED Interior Kit 1) How do I know

1) How do I know what LED bulb I need for my car

LEDs are polarity sensitive so if it doesn't turn on right away you might need to swap the positive and negative wires

The 2827 LED Bulb is the most commonly used Interior LED Bulb

The 1892 LED bulb is one of the most common used fitment

2017 Mercedes-Benz GLA250 Headlight Bulb High Beam and Low Beam D3S HID LED Interior Kit 1) How do I knowThis is a D3S Direct Factory Replacement HID BULB for your car that comes equipped with HIDs OEM (Original equipment manufacturer) Our Direct Factory Replacment bulbs is a very low energy consumption while being powered by 35W. 3,000K 4,300K 6,000K 8,000K 10,000K What's included One Pair of Direct Factory Replacement Bulbs, Available in 5 different temperatures 6,000k being the brightest.