02 Audi A4 Suspension Noise

Can anyone offer any suggestions or answers?

Several times I have visited the dealer with the complaint that when travelling over sharp bumps there is a squeeking noise. Sounds like a momentary brake squeek. (high pitched)
I have gotten two different solutions to the problem from the dealer but none of them have seemed to eradicate the problem on a permanent basis.
One thing they like to do is lubricate the suspension points??? They will not tell me what part of the suspension is being lubricated, but it seems to solve the problem
for a few weeks. The other problem they have found is cracked brake pads up front. Again this seems to alleviate the problem.....it lasts a bit longer (3-4k miles)..... Any thoughts here?
Also, my friend has an 03 Jetta and it makes the same noise!!

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