Recently my beloved 300D has developed a "shimmy" when I slow down to a stop, it start at about 15 mph and gets worst when I near 0. On the freeway during slow traffic the shimmy is kinda noticible (I've developed a sense for funny noices, actions etc) at around 15-20. I just had the steering box ajusted and new engine mounts put in by our Mechanic. I also replaced the front pads, got new tires all around, and switched to Mobil1 synthetic (engine just purrs now, specially on ye olde freeway

) I don't think I can attribute it to any of these things cause the shimmy would be worst the faster I go. On Saturday after a spirited drive I had to slam on the brakes at a light which locked up the tires for a split second, after that it felt kinda funny turning right, which has since gone away.
Also, at the beginning of the summer I rebuilt the whole front end, put new drive shafts in, replaced all the shocks and springs by myself but I don't think any of that can be attributed to the "shimmy" at such a low speed.
By Shimmy I mean the front of the car shakes back and forth (can be felt by my self and passenger).
Any help would be greatly appreciated.