Mercedes-Benz GLB 2023 Operator's Manual page 75

Press release knob 2 down fully and slide
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cover 1 in the direction of the arrow.
1
Fold out cover in the direction of the arrow
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and remove.
Remove battery compartment 3
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out the discharged battery.
Insert the new battery into battery compart-
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ment 3. Observe the positive pole marking in
the battery compartment and on the battery
when doing this.
Push in battery compartment 3.
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Re-attach cover 1 and push it until it
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engages.
Problems with the key, troubleshooting
You can no longer lock or unlock the vehicle
Possible causes are:
The key battery is weak or discharged.
R
Check the battery using the indicator lamp
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( page 70).
/
Replace the key battery, if necessary
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( page 72).
/
Use the replacement key.
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Use the mechanical key to lock or unlock
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( page 76).
/
Have key checked at a qualified specialist
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and take
workshop.
There is interference from a powerful radio signal
source
Possible causes if the function of the key is
impaired:
high voltage power lines
R
mobile phones
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electronic devices (notebooks, tablets)
R
Opening and closing
shielding due to metal objects or induction
R
loops for electrical gate systems or automatic
barriers
Make sure that there is sufficient distance
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between the key and the potential source of
interference.
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.
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