The bilstein hd's are the problem I think.

If you lower the car you should use the sport shocks which are intended for se on lowered cars.

This is only what I have read. I think the hd's are being compressed a bit because of the springs in your car, so they are hitting the bouncier part of the shock which is normally intended for more travel of the shock before it gets to that point.

I am not a tech, so you are only reading what I think makes sense to me, and based on my readings of this forum and other sites.

Alon

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'92 300CE - Sold
2004 C240 - 744 - C7 Wheels - Android Radio
2002 C320 - 816 - Sport Wagon