Siemens Extraklasse 1300 Instruction Manual And Installation Instructions page 48

Levelling procedure
48
All four appliance feet must be firmly on the ground.
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 counter nut 1 using the wrench.
q Adjust the height by means of turning the
appliance foot 2.
q Tighten the counter nut 1 against the housing.