The Audi TT MK2 offers a plethora of hidden features that can be unlocked using VCDS (Vag-Com Diagnostic System). This guide explores various tweaks and modifications achievable with this powerful diagnostic tool, enhancing your driving experience and customizing your TT to your preferences. From comfort features to subtle performance adjustments, VCDS allows you to tap into the hidden potential of your Audi TT MK2.
Common VCDS Tweaks for the Audi TT MK2
Several popular modifications can be easily implemented using VCDS:
Comfort and Convenience
- Window Roll (Comfort Operation): Enable automatic window up/down functionality via the remote key fob and door lock switch. This convenient feature allows you to open and close all windows simultaneously with a single press. This can also be enabled within the DIS (Driver Information System).
- DRL Options: Enable and customize Daytime Running Lights (DRLs) within the DIS. Options may include disabling the “wink” when using the turn signal. Although DRLs are standard on US models, VCDS allows further customization.
- Comfort Turn Signals: Adjust the number of blinks for lane changes using the comfort turn signal feature. This modification is typically done through adaptation channels, not direct coding. You can customize the number of blinks to your preference.
- Emergency Brake Lighting: Enhance safety by enabling brighter brake lights during emergency braking situations. You can configure this feature to activate via the brake lights or turn signals, with brake lights being the recommended option due to clearer signaling.
- Hill Hold Assist (HHA): While standard on many models, HHA can be enabled or adjusted via VCDS. Note that its effectiveness may be limited on DSG (Direct-Shift Gearbox) equipped cars.
Lighting Adjustments
- Fog Lights with DRLs: Enable the fog lights to function alongside the DRL LEDs. While not officially documented in VCDS, this modification is possible with specific byte/bit adjustments.
- Single Fog Light on Cornering: Activate a single fog light (left or right) to illuminate when cornering or using the turn signal. This feature can enhance visibility at night, but may be redundant with Adaptive Front-lighting System (AFS) equipped vehicles.
Advanced VCDS Modifications and Considerations
While many tweaks are straightforward, some require more advanced knowledge or additional hardware:
- XDS and DSR: Electronic Differential Lock (XDS) and Dynamic Steering Response (DSR) cannot be enabled on most TT MK2s without significant hardware changes, potentially requiring a newer ABS module.
- Lap Timer and Gauge Sweep: Features like the lap timer and gauge sweep on startup are dependent on the instrument cluster’s capabilities. The S and RS models generally have these features enabled from the factory.
- Tire Pressure Monitoring System (TPMS): Enabling TPMS requires the necessary hardware module. US-spec cars from 2008 onwards typically include TPMS as standard.
- Optical Parking System (OPS) in RNS-E: If your TT MK2 has the RNS-E navigation system, rear parking sensors, and the correct firmware, you can enable OPS visualization on the RNS-E screen while reversing. This relocates the parking display from the DIS to the RNS-E.
Conclusion
VCDS empowers Audi TT MK2 owners to personalize their driving experience. By unlocking hidden features and customizing various settings, you can tailor your TT to your individual preferences. Remember to research thoroughly and proceed with caution when making modifications with VCDS. While the potential benefits are significant, incorrect adjustments could potentially affect vehicle functionality. Always back up your original settings before implementing any changes.
