Warbling noise when the car reaches 42mph !!

[Gazza1972]

Hi,

Starting to run out of ideas to cure the problem I have with my A6 Avant. 

Its a 2012 2.0TDI 177bhp Avant which I’ve had from 6 months old, it’s now got just short of 75k on the clock and has started to make what I can only discribe as a warbling noise coming front the drivers side front wheel area when it reaches just over 40mph and 4th gear.

I’ve had the wheel bearing changed and just had all 4 wheels tracked, but no change, anyone any idea ??

 Cheers