Assuming your Audi is brand new, the recommended running-in period is 1500km (approximately 1000 miles). During this period you should avoid using full throttle or maximum engine revs, as well as avoid labouring the engine at low engine speeds, particularly when cold. You should also avoid towing during this period.

Even after this period is past, waiting until the engine is fully warm before using all the available performance will help its longevity.