See also:

Mercedes-Benz M-Class Owners Manual
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Load index
Tire data is vehicle-specific and may deviate from the data in the example. In addition to the load bearing index, load index 1 may be imprinted after the letters that identify speed index 6 ( ...

Coat hooks on the tailgate
WARNING The tailgate may close if too great a load is placed on the coat hooks. You and/or others could be trapped and injured. Only use the coat hooks for light clothing. 1 Coat hooks ...