I'm afraid to change the facia you do need to take the appliance out of it's integrated position so you can remove the top.
1. Remove the top cover 2 Open the dispenser drawer fully. Gently lift slightly and pull to remove the drawer.
Remove the 3 screws securing the control panel to the dispenser housing.
3. Release 2 screws, 1 each end on the top corner of the control panel.
4. Release 2 clips holding the control panel to the cabinet, gently ease the control panel upwards to dis-engage the lugs from the front panel.
5. Disconnect the wiring and lift clear.
Sorry, the machine does come out.
The method of removal will depend on how it was installed by your kitchen fitter.
Would it be possible to fit the new drawer front on it's own?
(not always possible due to changes in the parts)
Check it out, see how it goes and get back to me if you need more help.
Hope this helps
Let me know how it goes