If you own a new Q5 or an SQ5 you may feel a slight clicking through the accelerator pedal once you get up to speed. This may also be the case for other vehicles with quattro on demand. Worry not however it turns out this is perfectly normal. Speaking to Audi today it is the quattro on demand system uncoupling for the first time. The click noise occurs because the system is cold and it's the first time it disengages, from here it's pretty seamless and you'll never notice especially at speed (so they say). If however the feedback through the pedal is more than a light tap it might be worth speaking to your local Audi Centre for further advice. I spoke to mine today so thought i'd share.