shakey a4
 

low and high speed shake in front end of 02 a4 1.8tq

Thats not a lot of information to go on. Did it just start shaking all a sudden? Need a little more information to try to help here. First thing would be check the balance on your tires.
Second the wheels on these cars have such an offset that snow or ice or road ash can build up inside and cause an imbalance. So be sure to look thats thats not a problem.

Good Luck...