Mercedes-Benz AMG GT 53 4MATIC+ 2019 Operator's Manual page 335

MP3 player
R
USB devices
R
For details and a list of supported devices, visit
our website at http://www.mercedes-
benz.com/connect. Follow the instructions in
the "Media Interface" section.
Switching to Media Interface
Multimedia system:
Media à Media Sources
, .
Connect a data storage medium to the USB
#
port ( page 329).
→
Multimedia system 333
Select a media device.
#
Playable music files are played back.