  The quasi one-dimensional organic conductor (TMTTF)2AsF6 shows the charge
ordering transition at Tc101K to a state of the ferroelectric Mott insulator
which is still well conducting. We present and interpret the experimental data
on the gigantic dielectric response in the vicinity of TCO, concentrating on
the frequency dependence of the inverse $1/\epsilon$ of the complex
permittivity $\epsilon=\epsilon^\prime+i\epsilon^{\prime\prime}$. Surprisingly
for a ferroelectric, we could closely approach the 2nd order phase transition
and to deeply reach the critical dynamics of the polarization. We could analyse
the critical slowing-down when approaching Tc from both sides and to extract
the anomalous power law for the frequency dependence of the order parameter
viscosity. Moreover, below Tc we could extract a sharp absorption feature
coming from a motion of domain walls which shows up at a frequency well below
the relaxation rate.
