Blomberg SST455i Operating Instructions Manual page 13

If your refrigerator is unbalanced: You
can balance your refrigerator by
turning the legs of it as illustrated in the
figure. The corner where the leg exists
is lowered when you turn in the
direction of black arrow and raised
when you turn in the opposite
direction. Taking help from someone
to slightly lift the refrigerator will
facilitate this process.
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EN