58 Reg (New shape A3) Cambelt Change

What engine is it? I have a 06 A3 2.0 TDI (140) with 71k on the clock and phoned kennys auto vw & audi specialist who told me you should change the belt & water pump at 80k. Kenny used to be the foreman mechanic at highland audi before he opened his own business, so when i said the audi website recommends you change it at 5 years/75k which ever comes first he said that is just a money making scheme, apparently the a3's after 2003 have a much stronger belt and are based on mileage only, dosen't matter how long the belt has been on the car. I'm on a long life service which will be due at 78k so i'll get the belt & pump changed then.