Doors - Mercedes-Benz S-Class 2020 Owner's Manual

Insert emergency key 2 into the opening
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and lift up covering 3 and remove it.
Repeatedly tap the key against your palm
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until battery 4 falls out of the key.
Insert the new battery with the positive pole
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facing upwards. Use a lint-free cloth to do so.
Make sure that the surface of the battery is
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free of lint, grease and other impurities.
Insert the front tabs of covering
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housing and then press on both sides to
close it.
Make sure that covering 3
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closed.
Insert the front tabs of cover
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housing and then press until it is completely
closed.
Insert the emergency key again (
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Problems with the key, troubleshooting
You can no longer lock or unlock the vehicle
Possible causes:
The key battery is weak or discharged.
R
Check the battery using the indicator lamp
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( page 83).
/
Replace the key battery, if necessary
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( page 85).
/
Use the replacement key.
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Use the emergency key to lock or unlock
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( page 91).
/
Have the key checked at a qualified specialist
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3 into the workshop.
There is interference from a powerful radio
signal source
is completely
The key function is impaired by, for example:
high voltage power lines
R
1 into the
mobile phones
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electronic devices (notebooks, tablets)
R
page 85).
/
shielding due to metal objects or induction
R
loops for electrical gate systems or auto‐
matic barriers
Make sure that there is sufficient distance
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between the key and the potential source of
interference.
Opening and closing
You have lost a key
Have the key deactivated at a qualified spe‐
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cialist workshop.
If necessary, have the mechanical lock
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replaced as well.

Doors

Notes on the additional door lock
The additional door lock is only available for
vehicles for the United Kingdom.
& WARNING Risk of injury to persons
inside the vehicle when the additional
door lock is activated
If the additional door lock is activated, the
doors can no longer be opened from the
inside.
Never leave persons, in particular chil‐
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dren, unattended in the vehicle.
If there are persons in the vehicle, do
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not activate the additional door lock.
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