Your Audi A4 B9 has dynamic LED taillights that support animated light sequences — but from the factory, only the dynamic turn signals are active. RetroLab Pro can fully activate the welcome and goodbye taillight animation. This is not something VCDS or OBDeleven can do.
Taillight animation is a dynamic welcome and goodbye light sequence in your A4 B9's rear LED taillights. When you unlock or lock your vehicle, the taillights play a sweeping animated sequence instead of simply turning on and off.
This is more than a cosmetic feature — it provides a clear visual indication that your vehicle has locked or unlocked, which is especially useful in parking garages and at night.
This is where RetroLab Pro is fundamentally different from other coding tools.
VCDS and OBDeleven can only switch between animation styles (Standard to RS, for example) on vehicles that already have the animation enabled. They change an existing setting from one value to another.
RetroLab Pro performs the full activation from scratch. On A4 B9 models with supported taillights (PR-8VM), the animation is not enabled from the factory — only the dynamic turn signals are active. Enabling the animation requires new data to be written and a multi-step activation procedure. No other consumer tool can do this.
After activation, the A4 B9 Sedan supports the S-line animation style.
Audi A4 B9 models from 2020 to 2023 with factory LED taillights that support dynamic functions (PR code 8VM).
Submit your VIN to verify your A4's taillight configuration.
What you need: Windows PC + ENet cable, or iPhone 15/16/17 + USB-C to LAN adapter + ENet cable.
Price: €100 — one-time full activation. Not a coding change — a complete activation that no other tool offers.
Submit your VIN and we will verify compatibility for your vehicle. No payment until we confirm it works.