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:

    Notes for 4MATIC vehicles
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    Using the SmartKey
    – Turn the SmartKey to position 0 in the ignition lock and remove it. The immobilizer is activated. If you turn off the engine with the SmartKey and then remove it from the ignition lock ...

    Fuse box in the engine compartment
    – Open the hood. – Remove any existing moisture from the fuse box using a dry cloth. – To open: open clamps 2. – Fold cover 1 upwards in the direction of the arrow and remove it. Make s ...