See also:

Mercedes-Benz M-Class Owners Manual
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Important safety notes
WARNING Gasoline is highly flammable and poisonous. It burns violently and can cause serious personal injury. Never allow sparks, flames or smoking materials near gasoline. Turn off the engi ...

Selecting an active partition (USB mass storage devices only)
You can select this function for USB mass storage devices when the storage device is partitioned. Up to four partitions (primary or logical; FAT format) are supported. The Windows formatting p ...