See more from Ask Carzone 
My Q3's stop-start isn't working...
I have Audi Q3 on a 21,plate. The stop start doesn't work properly, if driving at a normal speed and deaccelerate, the revs drop down to the ready mark with the A coming on. At high speed this is disconcerting. The revs go back up when I either accelerate, brake or coming to a down hill when the engine kicks back in.
Our answer:
Hi Paul,
Actually that sounds like it is working just fine to us. You seem to be describing the operation of the 'mild-hybrid' system, which allows for 'coasting' with the engine switched off for short periods in a bid to reduce fuel consumption. You can prevent it happening by using a different driving mode, but it is perfectly normal.
Have a motoring question? Ask us here!
Ask us anything motoring related and please provide as much information as possible so we can give you the most accurate advice.