See also:

ATA (Anti-Theft Alarm system)
A visual and audible alarm is triggered if the alarm system is armed and you open: a door the vehicle with the mechanical key the tailgate the hood The alarm is not switched off, even i ...

Mercedes-Benz M-Class Owners Manual
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Switching off the engine
Important safety notes WARNING   Do not turn off the engine before the vehicle has come to a complete stop. With the engine not running, there is no power assistance for the brake and s ...