Shaking Up And Down Even On Small Bumps

[suave]

Hi,

 

I own a Xantia 2.0 of 1999 model. Recently, it has started shaking up & down even on small bumps on the road. The local car mechanic thought it can be due to lack of hydraulic fuel-that resulted into malfunctioning of the suspension system.

I added the LHM fuel, 1 liter, but the problem is same. 

What you guys think can be the real issue and how can I fix it.

 

Thanks!