We studied the intracluster medium of the galaxy cluster CIZA J2242.8+5301 using deep XMM-Newton observations .
The cluster hosts a remarkable 2-Mpc long , \sim 50 -kpc wide radio relic that has been nicknamed the “ Sausage ” .
A smaller , more irregular counter-relic is also present , along with a faint giant radio halo .
We analysed the distribution of the ICM physical properties , and searched for shocks by trying to identify density and temperature discontinuities .
East of the southern relic , we find evidence of shock compression corresponding to a Mach number of \sim 1.3 , and speculate that the shock extends beyond the length of the radio structure .
The ICM temperature increases at the northern relic .
More puzzling , we find a “ wall ” of hot gas east of the cluster centre .
A partial elliptical ring of hot plasma appears to be present around the merger .
While radio observations and numerical simulations predict a simple merger geometry , the X-ray results point towards a more complex merger scenario .