Important safety notes

Have the batteries changed at a qualified specialist workshop.

WARNING
Batteries contain toxic substances.

Swallowing batteries can lead to serious health issues or death.

Keep batteries out of the reach of children.

Seek medical attention immediately if a battery is swallowed.

WARNING
The SmartKey batteries contain perchlorate material, which may require special handling and regard for the environment. Observe government disposal guidelines. California residents, see www.dtsc.ca.gov/ HazardousWaste/Perchlorate/ index.cfm.

    See also:

    Charging the battery
    WARNING Never charge a battery still installed in the vehicle unless a battery charger unit approved by Mercedes-Benz is being used. Gases may escape during charging and cause explosions ...

    Driving safety systems overview
    In this section, you will find information about the following driving safety systems: • ABS (Anti-lock Braking System) • BAS (Brake Assist System) • BAS PLUS (Brake Assist System Plus*) ...

    Mercedes-Benz M-Class Owners Manual
    ...