Hello,i Own A Golf1.4 Tsi 170 On A 06 Plate With 5600mls,took It Back To My Local Dealer Last Week Cos Of Poor Performance; Turbo Gargiles(think Thats How You Spell It)and Lack Of Power But When Turbo Sounds(whistiles) Right The Car Really Does Go Well!!!!!they Did A Mapping Update Off The Internet And Said It Should Be Ok.now When Pulling Hard Through The Revs The Car Surges Through The Range And Turbo??? Problem Is Still There Sometimes.