Sorry, I used the wrong term, sp3ctre. What I should have said is Acceleration assistant with SMG.
Here's what it says in my manual on page 42:
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The acceleration assistant permits optimum racing-style acceleration on skid-resistant roads.
Warning: Do not use the acceleration assistant too often, as this could cause the vehicle's parts to wear prematurely.
1. Activiate Driving Dymamic Control
2. Press the DTC button, refer to page 51, for more than three seconds
3. Depress the accelerator all the way down rapidly: kickdown. The optimum rpm for driving off will be adjusted.
Note: To maintain vehicle stability, drive with the DSC switched on whenever possible.
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I have never done this so I don't know if it inhibits the RPM limiter or not.
[edit] I guess I don't even have SMG so this wouldn't work with my car anyway.