Miele KM 6639-1 Operating And Installation Instructions page 64

Safety distances
Safety distances to the sides
and back of the hob
It is advisable to install the hob with
plenty of space either side of it.
The minimum distance  shown below
must be maintained between the back
of the hob and a tall unit or wall.
The minimum distance ,  shown
below must be maintained between a
tall unit or a wall to the left or right of
the hob with a minimum distance of
300 mm on the opposite side.
 Minimum distance between the back
of the worktop cut-out and the rear
edge of the worktop:
50 mm
 Minimum distance between the
worktop cut-out and a wall or tall unit to
the right of it:
50 mm.
 Minimum distance between the
worktop cut-out and a wall or tall unit to
the left of it:
50 mm.
64
Not allowed
Highly recommended
Not recommended
Not recommended