Bosch exxcel 1100 Instruction Manual And Installation Instructions page 49

All four appliance feet must be firmly on the ground.
Levelling procedure
The washing machine must not wobble.
Level the washing machine with the assistance of the
four adjustable feet and a spirit level:
q Loosen the lock nut 1 using the wrench.
q Adjust the height by means of turning the
appliance foot 2.
q Tighten lock nut 1 against the housing.
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