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Home >> BMW >> 2009 >> 528i Standard >> Repair and Diagnosis >> Body & Frame >> Towing Systems >> Towing - Service Information >> Electrically Operated Trailer Coupling >> System functions >> Emergency operation
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Emergency operation

If the power supply is interrupted during operation, various signal conditions could be lost.

When power is available again, the button must be pressed and held for 5 seconds. This will switch the drive on (emergency operation).

If the power supply is interrupted, the trailer coupling cannot be released.