LS 460 RWD V8-4.6L (1UR-FSE) (2010)
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(c) Select "Hands-free Volume Setting" from the "Function Check/Setting" screen.
(d) Hands-free Volume Setting
(1) Check the hands-free volume level.
NOTICE:
Sound quality may deteriorate when the receive voice level is changed more than necessary. For this reason, check that the receive
voice quality is still acceptable after changing this setting.
