  Using the mosaic of six XMM-Newton observations, we study the hydrodynamic
state of the A3562, a cluster in the center of the Shapley Supercluster. The
X-ray image reveals a sharp surface brightness gradient within the core of
A3562, a 200 kpc ridge extending to the south-west. A nearby group, SC1329-313,
imaged within this program also exhibits a tail aligned with the ridge. Study
of the pressure and entropy identified the ridge with a 40% pressure
enhancement. An associated Mach number of 1.15 relative to a polytropic sound
speed for a 5 keV plasma requires the velocity of the group to be 1400 km/s,
while the projected velocity difference between the cluster and the group
amounts to 1200-1500 km/s. Apparent disruption of the group, if attributed to
the ram pressure, also requires the velocity of the group in the cluster frame
to amount to 1700+/-150 km/s. The sharp surface brightness gradient at the
center is identified with a contact discontinuity, which together with dove
tails in the the large-scale entropy distribution reveals a sloshing of the BCG
in response to the passage of the SC1329-313 group. Using the extent of the
low-entropy tails in A3562 we estimate the amplitude of sloshing motion to be
200/h_70 kpc and the oscillation frequency 1 Gyr.
