  We present the follow-up of three medium redshift galaxy clusters from the
SHARC survey observed with XMM-Newton. We studied RX J0256.5+0006 which shows
two components which are very likely in interaction. The smallest component
exhibits a comet-like structure indicating ram pressure stripping as it falls
onto the main cluster. The second cluster, RX J2237.0-1516 is an elliptical
cluster with a gas temperature of 3.0$\pm$0.5 keV. The third cluster, RX
J1200.8-0328 seems to be in a relaxed state because its shape is regular and we
do not see obvious temperature gradient. Its mean temperature is
5.1$^{+0.7}_{-0.5}$ keV.
