How to Enable Matrix Headlights on Audi A4 B9

When you activate Matrix headlights on your Audi A4 B9, you enable the full LED array system that was disabled for the US market:

• Adaptive High Beam Assist — High beams stay on while automatically masking oncoming and preceding vehicles from the beam pattern
• Dynamic Light Distribution — The light pattern adjusts based on your speed, steering angle, and road conditions
• Highway Mode — Extended beam range at higher speeds for better long-distance visibility
• Intersection Mode — Wider beam pattern when approaching junctions

These are the same functions that A4 B9 owners in Europe have had from day one. Your car already has the hardware — it just needs the software activation.

Matrix headlight activation is available on Audi A4 B9 models from 2020 to 2023 — both Sedan and Avant body styles.

Requirements:

• Matrix LED headlights must be factory-installed or retrofitted (standard LED headlights are not upgradeable through software)
• Both pre-facelift and facelift A4 B9 models are supported within the 2020–2023 range

If you are unsure whether your A4 has Matrix LEDs, check for the PR code on your vehicle's equipment list or submit your VIN for a free compatibility check.

• A Windows PC with an ENet cable, OR an iPhone 15/16/17 with a USB-C to LAN adapter and ENet cable
• An internet connection
• Your vehicle's VIN

No VCDS license, no OBDeleven credits, no dealer appointment. RetroLab Pro guides you through every step.

Matrix headlight activation for the Audi A4 B9 is €200 — a one-time activation permanently linked to your VIN. No subscriptions, no recurring fees.

You only pay after we verify your vehicle is compatible. If your A4 does not support the activation, you pay nothing.