Mercedes-Benz Hands-free system Operating Instructions Manual page 22

Telephone settings
20
Radio fittings version
X
Press the W or X button on the
hands-free system.
or
X
Press the volume buttons on the steering
wheel (see vehicle Operating Instructions).
The volume is increases or decreases.
On the Radio fittings version, the call volume
of the hands-free system increases automat-
ically as the vehicle speed rises.
i
The set call volume is stored permanently.
Changing the call volume on the mobile
phone is not possible in hands-free mode.
When pressing the volume buttons with no
currently active call, you hear a brief beep-
ing tone as the volume buttons have no
function without an active call.