ive seen a3,s on this site that have been to qrsport for throttle body cleaning only to be told they have to go to a dealer for diagnostic and repair,why is this?they are a "specialist"why cant they fix it themselves without recharging,or charging twice.im in the repair game ,aswell as unit 20 even cheshire audi we cant believe how a specialist can charge to not fix a fault and then has the cheek to say go to a dealer,the very reason you choose specialists in the first place,,it gives the genuine specialists a bad name..rant over tim cooper renn-tech-uk