See also:

Mercedes-Benz M-Class Owners Manual
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Important safety notes
Do not leave the SmartKey in the trunk. You could otherwise lock yourself out. WARNING When leaving the vehicle, always remove the SmartKey from the ignition lock. Always take the SmartKey w ...

Optional Features
A number of packages and individual options are available for the GLK350. The Premium Package bundles a number of features, including a panoramic moonroof, power liftgate, a memory feature, Sirius ...