Miele KM 6357 Operating And Installation Instructions page 6

Safety clearances
Safety clearance to a wall covering
A safety clearance must be maintained between the countertop cut-out and any
wall covering to protect it from heat damage.
If the covering is made of a combustible material (e.g. wood), a safety clearance
e of 50 mm must be maintained between the cut-out and the covering.
If the covering is made of a non-combustible material (e.g. metal, natural stone,
ceramic tiles), a minimum safety clearance e of 50 mm less the thickness of the
covering must be maintained between the cut-out and the covering.
Example: 15 mm wall covering
50 mm - 15 mm = 35 mm minimum clearance
Flush-fitted cooktops
a Masonry
b Wall covering
Dimension X = thickness of wall covering
c Countertop
d Cut-out in the countertop
d Minimum safety clearance
for combustible materials is 50 mm
for non-combustible materials is 50 mm less dimension X
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Cooktops with frame or bevelled edges