Squeaking from both front wheels
 

Hi,

I have had a very annoying squeaking sound coming from both the front wheels when driving on bumpy roads, i have had the bushes re lubricated which quietened the squeak but didn't fix the problem, now the weird part is when i'm braking over a rough surface the squeaking stops... A technician has had a good look at the bushes and shocks and cannot find a problem, he said it's a problem that can't be found until it breaks... I don't quite know how to take this... Any help?

I have an A4 B7 2008 S-line 1.9TDI with 84k on the clock.