Home / DIYs / Vag-Com (VCDS) Mods for the MK2 Audi TT (2006-2014)


I’ve had my TT-RS for a week now, so time for the modding to begin. I already had my genuine Ross-Tech Vag-Com (VCDS) cable from my last car, so I figured I’d start by unlocking some “free” mods first. As always, write-down any codes before changing them so that if it does not achieve the desired effect you can reverse them. You can also refer to the Ross-Tech wiki for more detailed information on each code and function here. Most of these were accessed via Module 09.  This list is by no means exhaustive and I plan to update it as I find new things – I searched all over the internet to come up with this initial list since everything is very  fragmented for Audi TTs in terms of forums and posts. I apologize that I didn’t keep track of where I got certain codes from, but I went through and manually checked and recreated everything to make sure they worked. I’m not 100% sure this will work on all MK2 TTs, but these codes were successful on my 2012 TT-RS and likely to work with other later model TTs as well.

Module 9 (Central Electronics Mods)

All done via Module 9 (Cent Elect) and then going into the long coding helper menu:

  • Disable Amber Lights in Headlights:
    • Byte 17, Bit 1 – Uncheck to disable the amber lights when the headlights are on
  • DRLs always-on full brightness, except when headlights on (then they dim somewhat):
    • Byte 15, Bit 3 –  Uncheck it and the LEDs to stay on all the time (aka dewinking)
    • Byte 17, bit 4 – ensure ADL checked
    • Byte 24, bit 7 – ensure DRL’s as Position Lights checked
    • Byte 25 – manually overwrite the 2 “00” digits in row 3) with 86 (may not be necessary)
    • Byte 26 Bit 3  – uncheck DRL only active with ADL active, ensures DRLs on even if headlight switch is off
    • Byte 27, bit 2 – check LED DRL module for parking position light and DRL…check it.
  • Windows controlled via key fob (hold lock to roll-up, unlock to roll-down)
    • Byte 3, Bit 3 – ensure  comfort opening/closing via doors checked
    • Byte 3, Bit 5 – check comfort opening/cosing via key fobit 5 via key fob buttons
    • Note: if this still doesn’t work, go into the DIS and choose Set – Windows – Convenience Open – and make sure “Automatic on” is checked.
  • Synchronized side mirrors
    • Byte 8, Bit 6 –  Check it to allow you to simultaneously readjust the driver’s and passenger’s mirrors. You only need to adjust the driver’s mirror for a wider/narrower view for a different driver or seat position and the passenger mirror will move accordingly.
  • Flashing emergency lights with ABS activation
    • Byte 16, Bit 0 – comfort indicators (default on) gives 4 blinks of the turn signals with a brief push…aka lane change convenience mode
    • Byte 16, Bit 1 – emergency brake lights flashing (default on) flashes brake lights when abs triggers to attract more attention to braking
  • Lower Side Mirrors When Reversing
    • Byte 4, Bit 3 – Ensure checked

Disable seatbelt chime:

  • Module 17 (Instruments), Coding, change 2nd to last digit from 8 to 0.

Got any others I’ve missed? Leave me a comment, and I’ll be sure to update this post once I verify it works…


About the author: Nick Roshon


Nick has been an Audi owner and fanatic for the last 10 years, and started Nick's Car Blog in 2009 to share DIYs and pictures of his A4. Currently he drives a 2012 Audi TT-RS, and has previously owned a B7 S4, B7 A4, and an 82 Audi Coupe (GT) LeMons race car. In his day job, Nick is a digital marketer and lives in San Diego, CA, USA.


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