Rear LEDs stay on whenever the DRLs are active.
The Audi A4 B9 (2016–2024) is a highly advanced machine packed with electronic control units (ECUs). To save production costs, Audi installs the same hardware across various trim levels but deactivates certain premium options via software.
Customize which lights turn on when you unlock or lock the car in the dark.
Keep the engine running at stoplights (requires memory module or coding).
Coding : Byte 04, Enable Bit 6 (Displays the lane lines on your dashboard). : 09 (Central Electrics) Coding : Byte 35, Enable Bit 0. Module : 44 (Steering Assistance) Coding : Byte 02, Enable Bit 7. audi a4 b9 coding list
: Module 17 > Byte 2 > Bits 3-7 (Requires choosing the specific vehicle variant, e.g., RS4 for A4). Lighting & Convenience Customization
Central locking system -> beep_at_opening (set to Yes) / beep_at_closing (set to Yes) ⚠️ Safety Warning & Disclaimer
Coding your Audi A4 B9 (2016+) can unlock significant hidden features and personalize your driving experience. The most popular tools for this are (Ross-Tech) and OBDeleven . Top Recommended Mods
Allows passengers to watch DVDs or videos on the MMI screen while the car is moving. Rear LEDs stay on whenever the DRLs are active
Disables the annoying feature that shuts off your engine at red lights .
→ Adaptations → (47)-Audio Management-Volume_software_amplifier Change value from 100 to 150 . This increases the internal pre-gain by 6dB. It gives a noticeable "wake-up" to the standard Audi sound system. Warning: Do not exceed 180 or you will get distortion.
2. Activate Scandinavian DRL (Rear Lights On with Front DRLs)
: The needles for the speedometer and tachometer sweep to their maximum and back upon starting the engine. Lap Timer & Oil Temperature Customize which lights turn on when you unlock
The following list includes some of the most popular and useful codes for the Audi A4 B9:
A more mobile-friendly option that uses a Bluetooth dongle and a smartphone app. It offers "One-Click Apps" for those who want to avoid manual long coding. Safety & Visual Modifications
If you have dynamic fronts but static rears, you can often code the rears to sweep sequentially.
Advanced tool required for flashing firmware or complex parameter changes. Best Practices
(US Spec) Turns off the orange lights in the headlights.