Coding List | Audi A4 B9

New users often confuse the two sections in VCDS.

Pro Tip: Use the "Search" function in VCDS/OBD11. Instead of scrolling through 100 channels, search for keywords like Ambiente, Komfort, or Spiegel.

The quality of the data is generally very high because the Audi coding community is meticulous. A comprehensive list usually breaks down coding by Module (ECU).

Change the intensity of the steering wheel vibration.

Change at what speed the blind spot monitoring activates.

The Audi A4 B9 (2016–present) uses electronic control units (ECUs) that can be configured (coded) to enable, disable, or modify vehicle features. Coding changes are done via diagnostic tools (e.g., VCDS/ODIS, OBDeleven, VCP) using OBD-II connections and typically involve adjusting long coding bytes or adaptation channels. Common coding targets include lighting, convenience features, driver assistance, locking, and display options. audi a4 b9 coding list

This controls exterior lights, wipers, and mirrors.

| Feature | Adaptation Channel | Value / Change | Notes | | :--- | :--- | :--- | :--- | | Coming Home / Leaving Home via Fog Lights | (9)-Außenlicht_uebergreifend-Komfortbeleuchtung_mit_Nebellicht | Change to Active | Allows fogs instead of low beams for driveway lighting. | | Scandinavian DRLs (Rear tails always on) | (6)-Leuchte24SL HRA69-Lichtfunktion A 24 | Change to Daytime running light | Safer for snowy/foggy regions. | | Disable Seatbelt Chime (Driver) | (13)-Seat Belt Warning-Seat Belt Warning Response Driver | Change to No Belt | Legal warning: Do this at your own risk. | | Mirror Dip in Reverse | (23)-Spiegelverstellung-Rueckwaerts_einklappen | Change to Active | Requires memory mirrors. Passenger mirror dips when in R. | | 4-Way Hazard Flashers (Emergency Brake) | (66)-Aussenlicht_Blinker-Emergency_alert_blinken | Change to Active | Flashers activate under hard braking. | | Alarm Beep on Lock/Unlock | (1)-Akustische Rueckmeldung global-Akustische Rueckmeldung entriegeln | Change to Active | Adds chirp. Also adjust volume at channel (6)-Akustische Rueckmeldung global-Dauer der Akustischen Rueckmeldung vom Einfachhorn. |

Below are frequently accessed modules and representative coding/adaptation channels. Exact names and channel numbers vary by software/tool and vehicle option level.

  • 09-Central Locking / 46-Central Conv.

  • 17-Instruments (Cluster)

  • 19-CAN Gateway / 9A-CAN Gateway

  • 21-ABS/ESP

  • 42-Door Elect, Driver/Passenger (or 46-Central Conv.)

  • 44-Steering Assist / 5F-Full Range Radar (Driver Assist)

  • 4F-Audio / 56-Radio

  • 5F-Information Electr. (Infotainment) / MMI

  • 6F-Diff Lock / Transfer Box (on AWD variants)

  • 76-Display Interface / 7X-Display

  • 8X-Light Control / Convenience Lighting

  • AC Control / Climate (08)

    • You cannot use the coding list without an interface tool.