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October 1, 2016 Service bulletin

?AUDIO VOLUME NOT RESTORED AFTER MSA STOP, ENTRY HEAD UNIT. Volume of audio system (when set to near...

BMW technical service bulletin B652316 for 2014-2017 BMW X5, 2012-2016 BMW 328I and 2011-2017 BMW X3 and others.

Bulletin number
B652316
Component
Equipment: electrical: radio/tape deck/cd etc.
Summary
?AUDIO VOLUME NOT RESTORED AFTER MSA STOP, ENTRY HEAD UNIT. Volume of audio system (when set to near maximum) is reduced when Auto Start-Stop (MSA) stop occurs and is not restored upon automatic engine restart. This is normal system behavior - serves to protect the head unit, battery drain and avoidance of incremental leaps in the loudness. The loudness is reduced to 2/3 of maximum and is not restored. Note: Air conditioning output is also reduced upon MSA stop and is not restored for similar reasons.

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