Help with shock absorber problems (Audi A4 B5)

There are several unmistakable signs of reduced shock absorber performance:

• Steering vibration because the wheels do not have constant contact with the ground.
• The body continues to sway after driving over an uneven surface.
• "Amorphous" behavior of the car on turns, since the wheels inside the turn are not pressed to the ground enough, and the outer wheels are not unloaded enough.
• Bouncing wheels; this can be observed by someone riding next to you or someone accompanying you from behind.
• Multiple interrupted full braking trail due to jumping wheels under full braking (suppressed by ABS regulation in a vehicle with anti-lock braking system).
• Uneven wear of tires and increased wear.
• Significant traces of oil on the outside of the shock absorber. Minor leaks are normal.