Can you post the E-Nr number of you machine please?
If not on a label it will be very faintly etched across the top of the inner door.
The new machine will fit the same gap that was required for the existing machine.
There is a recess at the bottom rear of the machines for any pipework to run through if the appliance is hard up to the wall.
However, the machine shouldn't be hard up to the wall if you have a standard 600mm deep unit and worktop.
Hope this helps