Front D3 Air Suspension Rattle

[snapdragon]

Hello folks.
I bought a 2006 D3 A8 a month or so ago, and it has a rattle from the front suspension. It is a lightweight continuos rattle over joints in the road, drain covers and cobbles. It doesn't really clunk, it just rattles up to several times a second. I don't really get the problem on the open road or motorway, just around cities. It happens at all damper settings/ride heights.

Are there any common weak spots for this?

On other cars I have had similar rattles from top strut mounts and anti-roll bar links but the latter don't look obviously worn and don't have balljoints anyway.

Thanks for any tips or experience. PS, the mileage is 180,000.